Author
Arkansas Agricultural Experiment Station
2
California Agricultural Experiment Station
1
Eastern Bengal and Assam (India). Dept. of Agriculture
1
Estación Experimental de Aula Dei
1
Imperial Council of Agricultural Research (India)
1
Indian Council of Agricultural Research
1
Instituto Nacional de Investigaciones Agrícolas
1
Instituto Nacional de Investigaciones Forestales y Agropecuarias (Mexico)
1
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (Mexico)
1
Malaya. Department of Agriculture
1
Malaya. Division of Agriculture
1
Malayan Union. Department of Agriculture
1
Mexico. Dirección General de Agricultura
1
Mexico. Secretaría de Agricultura y Ganadería
1
Mexico. Secretaría de Agricultura y Recursos Hidráulicos
1
Mexico. Secretaría de Agricultura, Ganadería y Desarrollo Rural
1
North Dakota Agricultural Experiment Station (Fargo)
1
Pennsylvania State Agricultural Society
1
Philippines. Bureau of Plant Industry
1
Philippines. Department of Agriculture and Natural Resources
1
South Dakota Agricultural Experiment Station
1
Straits Settlements. Department of Agriculture
1