共 8 条
[1]
BEAR FE, 1942, SOILS FERTILIZERS
[2]
FLEMING WE, 1947, E716 US BUR ENT PLAN
[3]
Godfrey GH, 1934, PHYTOPATHOLOGY, V24, P1332
[4]
GRANGER M. M., 1949, Agric. Chem., V4, P34
[5]
GRANGER ML, 1949, AGR CHEM, V4, P35
[6]
GRANGER MM, 1949, AGR CHEM, V4, P85
[7]
GRANGER MM, 1949, AGR CHEM, V4, P79
[8]
NELSON RH, 1940, E517 US BUR ENT PLAN