共 9 条
[2]
LOVE HC, 1966, 9040 AGR RUR DEV ACT
[3]
PATTERSON J. K., 1960, JOUR RANGE MANAGEMENT, V13, P255, DOI 10.2307/3895054
[4]
ROGLER G. A., 1957, Journal of Range Management, V10, P156, DOI 10.2307/3893809
[5]
SMITH A. D., 1961, CANADIAN JOUR PLANT SCI, V41, P862
[7]
SMOLIAK SYLVESTER, 1965, J RANGE MANAGE, V18, P11, DOI 10.2307/3895740
[8]
SNEVA FORREST A., 1958, AGRON JOUR, V50, P40
[9]
THOMAS JR, 1964, 82 US DEP AGR S DAK