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R. F. Arrendale
Tobacco and Health Laboratory, Science and Education Administration I Agricultural Research, United States Department of Agriculture, Athens, Georgia, U.S.A.
R. F. Severson
Tobacco and Health Laboratory, Science and Education Administration I Agricultural Research, United States Department of Agriculture, Athens, Georgia, U.S.A.
M. E. Snook
Tobacco and Health Laboratory, Science and Education Administration I Agricultural Research, United States Department of Agriculture, Athens, Georgia, U.S.A.