共 19 条
[11]
HANSON HAROLD C., 1951, AUK, V68, P164
[12]
Hochbaum H. Albert, 1942, TRANS NORTH AMER WILDLIFE CONF, V7, P299
[13]
MEWALDT L. RICHARD, 1958, CONDOR, V60, P165, DOI 10.2307/1365412
[14]
Pirnie M.D., 1935, MICHIGAN WATERFOWL M
[15]
Shortt Terence M., 1943, WILSON BULL, V55, P3
[16]
SMART MG, 1965, J WILDL MGMT, V29, P533
[17]
SMART MG, 1962, THESIS U MISSOURI
[18]
Stewart I. F., 1963, Bird Study, V10, P1
[19]
WELLER MILTON W., 1957, WILSON BULL, V69, P5