共 21 条
[1]
ARKLEY RS, 1955, CALIF AGR, V9, P15
[2]
BENTLEY J. R., 1954, JOUR RANGE MANAGEMENT, V7, P25, DOI 10.2307/3894622
[3]
BENTLEY JR, 1951, 870 US DEP AGR CIR
[4]
BISWELL H. H., 1956, Journal of Range Management, V9, P116, DOI 10.2307/3894229
[5]
BISWELL H. H., 1956, JOUR RANGE MANAGEMENT, V9, P19, DOI 10.2307/3894645
[6]
CONRAD J. P., 1951, CALIFORNIA AGRIC, V5, P3
[9]
HERVEY DONALD F., 1949, JOUR RANGE MANAGEMENT, V2, P116, DOI 10.2307/3893681
[10]
HITCHCOCK AS, 1951, US DEP AGR MISC PUB, V200