共 32 条
[21]
SEAL US, 1969, FED PROC, V28, P1410
[22]
SHARP WM, 1956, J MAMMAL, V34, P170
[24]
STEWART RE, 1971, 92 US DEP INT BUR SP
[25]
Stuewer F. W., 1943, ECOL MONOGR, V13, P203, DOI 10.2307/1943528
[29]
VANDRUFF LW, 1971, THESIS CORNELL U
[30]
Verts B. J., 1963, Journal of Wildlife Management, V27, P325, DOI 10.2307/3798504