George Acquaah
Robert Hay
Allen R. Overman
Ramdane Dris
N. K. Fageria
K. J. Boote
Jeffrey S. Amthor
Unknown Author
Daniel Wallach
Lloyd T. Evans
Food and Agriculture Organization of the United Nations
Manjit S. Kang
Gerhard Geisler
Prakash Raj Sapkota
Stephen Smith
Benjamin Wolf
Kinsei Rekishi Shiryō Kenkyūkai
Indian Council of Agricultural Research