References
- JARABAK, Joseph R. Management of an Orthodontic Practice; C. V. Mosby, St Louis, 1965 (p, 24-64).
- ORMCO CORPORATION, 1332 South Lone Hill Road, Slenora, California. U.S.A.
- ROCKY MOUNTAIN DENTAL PRODUCTS, P.O. Box 1887, Denver, Colorado 80201, U.S.A.
- UNITEK CORPORATION, 950 Royal Oaks Drive, Monrovia, California 91016, U.S.A.