共 61 条
[23]
HUMPHREY RR, 1955, 266 U AR B
[24]
JAMESON DA, 1959, MAR WEST WEED CONTR, P20
[26]
JOHNSEN TN, 1960, THESIS DUKE U
[27]
KEARNEY T. H, 1951, ARIZONA FLORA
[28]
KEEN FP, 1952, USDA273 MISC PUBL
[29]
KEEN FP, 1958, USDA1169 TECH B
[30]
LECLERG EL, 1957, ARS2030 US DEP AGR A