United States. General Accounting Office
United States. Agricultural Research Service
中国农业百科全书编辑部
Howard, Albert Sir
Pierre R. Crosson
P. W. Mausel
John L. Nowland
Jon Hellin
K. R. Krishna
Unknown Author
Eldor A. Paul
Gero Benckiser
George Washington Carver
Jairo Restrepo
S. Guillobez
Walter Blith
Heindel, Max
Richard Voldseth