共 20 条
[1]
ANDERSON WILLIAM, 1965, CALIF FISH GAME, V51, P5
[2]
Bellrose F. C., 1976, DUCKS GEESE SWANS N
[4]
DRAPER NR, 1966, APPLIED REGRESSION A
[5]
DZUBIN A, 1969, Canadian Wildlife Service Report Series, V6, P178
[8]
HINES JE, 1977, CAN FIELD NAT, V91, P248