共 10 条
[3]
MATTHEW DL, 1976, E49 PURD U COOP EXT
[4]
Maxwell-Lefroy H., 1908, MEM DEP AGR INDIA EN, V1, P253
[7]
Satterthwait AF, 1933, J AGRIC RES, V46, P0517
[8]
Tower DG, 1916, J AGRIC RES, V6, P455
[9]
Waldbauer G. P., 1968, P229, DOI 10.1016/S0065-2806(08)60230-1
[10]
WALKDEN HH, 1950, USDA849 ENT CIRC