共 7 条
[1]
BUSK A, 1917, J AGR RES, V9, P354
[4]
GLICK PA, 1939, US DEP AGR TECH B, V673
[5]
HUSAIN MA, 1934, INDIAN J AGR SCI A 1, P261
[6]
LOFTIN UC, 1921, US DEP AGR B, V918
[7]
PFRIMMER TR, 1955, ARS336 US DEP AGR