共 5 条
[1]
BOND WE, 1951, LA FORESTRY COMM B, V4
[2]
CAMPBELL ROBERT S., 1949, JOUR RANGE MANAGEMENT, V2, P30, DOI 10.2307/3893830
[3]
CAMPBELL RS, 1951, LA AGR EXPT STA B, V452
[4]
CAMPBELL RS, 1951, INSTRUCTIONS FORAGE
[5]
Wahlenberg W.G., 1939, USDA TECH B, V683