Authors
M. E. Snook
Tobacco and Health Laboratory, Science and Education Administration I Agricultural Research, United States Department of Agriculture, U. S. A.
P. J. Fortson
Tobacco and Health Laboratory, Science and Education Administration I Agricultural Research, United States Department of Agriculture, U. S. A.
O. T. Chortyk
Tobacco and Health Laboratory, Science and Education Administration I Agricultural Research, United States Department of Agriculture, U. S. A.