共 29 条
[2]
BATHURST N. O., 1958, NEW ZEALAND JOUR AGRIC RES, V1, P540
[3]
BEESON KC, 1941, USDA369 MISC PUB
[4]
CORBETT JL, 1969, INT ENCYCLOPAEDIA FO, V17, P593
[5]
DEINUM B, 1966, 6611 LANDB WAG MED, P1
[6]
FONTENOT JP, 1973, FED PROC, V32, P1925
[8]
GRUNES DL, 1973, CSSA4 SPEC PUB, P113