Johannes Lehmann
Yong-Sik Ok
Ehrenfried Pfeiffer
A. Gaus
Unknown Author
Samuel L. Tisdale
Rattan Lal
David E. Hill
Cyril G. Hopkins
C. A. Bower
United States. Bureau of Agricultural and Industrial Chemistry
Janet C. McAllister
Robert B. Ferguson
Howard, Albert Sir
Myron Ansel Bachtell