ALDHOUS, J. R. (1962): Provenance of Sitka spruce: an account of nursery stage of experiments sown in 1958. In: UK For. Comm. Rep. For. Res., 1960/61, pp. 147-154.
BACON, G. J., HAWKINS, P. J. and JERMYN, D. (1977): Morphological grading studies with 1-0 slash pine seedlings. Aust. For. 40 (4): 293-303.10.1080/00049158.1977.10674172
BARNETT, J. P. (1979): An easy way to measure cone specific gravity. In: KARRFALT, R. P., Comp. Proceedings of the seed collection workshop, 1979 May 16-18. Macon. G.A. SA-TP-8. Atlanta G.A: US Dept. of Agri. For. Serv., State and Priv. Forestry, 21-23.
BONNER, F. T. (1983): Germination responses of loblolly pine to temperature differentials on a two-way thermogradient plate. J. Seed Technology 8(1): 6-14.
DEVAGIRI, G. M. (1997): Evaluaton of seed source variation in seed and seedling traits in Dalbergia sissoo Roxb. Ph.d. Thesis, FRI Deemed Univ., Dehradun, India, pp. 189.
DONAHUE, J. K. and LOPEZ-UPTON, J. (1996): Geographical variation in leaves, cone and seeds of Pinus gregii in native forests. For. Ecol. Manage. 82: 145-157.
DORMLING, I. (1979): Influence of light and temperature on photoperiodic response of Norway spruce provenances. I: Proc. IUFRO Norway spruce Meeting Bucharest, pp 398-408.
GERA, N., GERA, M and PUROHIT, M. (2000): Source variation in seed and germination characteristics in Acacia nilotica Willd. Ex Del. Seed Research. 28 (1), 27-31.
HAGEM, O. (1931): Forsok med vestamerikanske traeslag (Experiments with west American tree species). Medd. Vestl. Forstl. Forsoks. 4 (2), No. 12. 217pp.
HARPER, J. L., LOVELL, P. H. and MOORE, K. G. (1970): The shapes and sizes of seeds. Ann. Rev. Ecol. Syst. 11: 327-356.10.1146/annurev.es.01.110170.001551
INGRAM, C. L. (1984): Provenance research on Pinus elliottii Englemann and P. taeda Linn is Malawi. In: Provenance and genetic improvement stratgies in tropical forest trees. BARNES, R. D. and GIBSON, G. L. (eds.) Proc. Jt. Work. Conference, IUFRO Mutare, Zimbabwe, pp. 265-277.
JOHNSON, J. D. and CLINE, M. L. (1991): Seedling quality of southern pine. In: DUREAYA, M. L. and DOUGHERTY, P. M.(EDS). Forest Regeneration Manual, 143-159. Kluwer Academic Publishers: Dordrecht/Boston/London.10.1007/978-94-011-3800-0_8
KARLBERG, S. (1961): Development and yield of Douglas Fir (Pseudotsuga taxifolia (Poir.) Britt.) and Sitka spruce (Picea sitchensis (Bong.) Carr.) In Southern Scandinavia and on the Pacific Coast, Roy. Sch., Stockholm, Bull. 34, 141pp.
KHALIL, M. A. K. (1986): Variation in seed quality and some Juvenile characters of white spruce (Picea glauca Moeneu Voss). Silvae Gen. 35 (2-3): 78-85.
KRAUS, J. F., WELLS, O. O. and SLUDER, E. R. (1984): Review of provenance variation in loblolly pine (Pinus taeda L.) in the southern United States. In: Provenance and genetic improvement strategies in tropical forest trees. BARNESS, R. D. and
LAMICHHANEY, B. P. (1985): Variation of Alnus nepalensis D. Don. In Nepal. Summer trail at Pakhribas (Dhankuta) Nepal. Forestry Technical information Bullentin (NEFTIB). Forest Research and Information Centre, Forest Survey and Research Office, Department of Forest, Nepal 11: 10-15.
LAVENDER, D. P. (1985): Bud dormancy. In: DUREAYA, M. L. (Ed).Evaluation Seedling Quality: Principles, Procedures and Predictive Abilities Of Major Test, pp. 7-15. For. Res. Lab., Ore State Univ., Corvallis, Oregon.
OMI, S. K. (1991): The target seedling and how to produce it. In: Texas Forest Service. Proc. from the nursery managementworkshop. Sept. 10-12, Alexandria, LA. Texas Forest Service, Reforestation Department, College station. Texas. pp. 88-118.
NGULUBE, M. B. (1989): Genetic variation in seed germination and seedling growth of 24 Gliricidia sepium provenances. For. Ecol. Manag. 28 (1): 1-6.10.1016/0378-1127(89)90069-8
PITCHER, J. A. (1984): Geographic variation patterns in seed andnursery characteristics of black cherry. USDA For. Serv. Res. Pap., Southern For. Expt. Sta., No. SO-208, p. 8.
REHFELDT, G. E. (1994): Adaptation of Picea engelmannii population to the heterogenous enviroments of the intermountain west. Can. J. Bot. 72: 1197-1208.
REHFELDT, G. E. and WYCOFF, W. R. (1981): Periodicity in shoot elongation among populations of Pinus contorta from the northern Rocky Mountain. Ann. Bot. 48: 371-377.
SALAZAR, R. (1986): Genetic variation in seeds and seedling of ten provenances of Gliricidia sepium (Jacq.) Stend. For. Ecol. Manag. (1-4): 391-401.10.1016/0378-1127(86)90035-6
SINGH, V., SAH, V. K., BANA, O. P. S. and SINGH, V. (1996): The effect of cone diameter on seed yield, moisture content and germination in Himalayan blue pine (P. wallichiana B. B. Jacks). Ind. For. 122: 150-154.
SORENSEN, F. C. (1979): Provenance variation in Pseudotsuga menziesii seedlings from the var. menziesii and var. glauca transition zone in Oregon. Silvae Gen. 28: 96-103.
SORENSEN, F. C. and MILES, R. S. (1978): Cone and seed weight relationship in Douglas-fir from western and central region. Ecology. 59 (4): 641-644.10.2307/1938763
STEPHAN, B. (1974): Geographical variation in Pinus stobus on the basis of preliminary results of field trial in lower Saxony. Silvae Gen. 23: 6, 214-220 10 ref.
THAPLIYAL, R. C. and DHIMAN, R. C. (1997): Geographic variation in seed and seedling characteristics in Pinus roxburghii sarg. From Himachal Pradesh. Ann. For. 5 (2): 140-145.
TRIPATHI, R. S. and BARIK, S. K. (2001): North-east ecoregion biodiversity strategy and action plan Submitted to: Ministry of Environment and Forests Government of India New Delhi.
TURNBULL, J.W. (1975): Seed collection - sampling consideration and collection tech. In: report of FAO/DANIDA training course of forest seed collection on handling held in Chiang Mai, Thailand, Feb/March, FAO/TF/RAS-11(DEN), FAO, Rome.
WANG, G., ARNOLD, R. J., GARDINER, C. A., ZHANG, I. and WU, Z. (1999): Seed source variation for growth in Eucaltptus dunnii; results from trial in south central China. Australian Forestry 62 (2): 125-137.