共 22 条
[1]
BASHAW E. C, 1958, AGRON JOUR, V50, P753
[2]
BROWN W. V., 1957, BOT GAZ, V118, P246, DOI 10.1086/335950
[4]
BRYANT GD, 1952, THESIS U OKLAHOMA
[5]
Esau K, 1944, J AGRIC RES, V69, P0095
[7]
FRETER L. E., 1955, BULL TORREY BOT CULB, V82, P121, DOI 10.2307/2481828
[9]
GOULD F. W., 1959, Journal of Range Management, V12, P25, DOI 10.2307/3895213
[10]
Gould F. W, 1964, TAXONOMY BRITTONIA, V16, P182