共 11 条
[1]
Armstrong E. A, 1942, BIRD DISPLAY
[2]
COWARD TA, 1926, BIRDS BRIT ISLES MIG
[3]
NICHOLSON EM, 1930, IBIS, P280
[4]
NICHOLSON EM, 1930, IBIS, P395
[5]
SALOMONSEN F, 1935, ZOOLOGY FAEROES
[6]
TUNNICLIFFE CF, 1945, BIRD PORTRAITURE
[7]
Williamson K., 1947, IBIS, P511
[8]
WILLIAMSON K, 1946, N W NATURALIST, P167
[9]
Williamson Kenneth, 1943, IBIS, V85, P486, DOI 10.1111/j.1474-919X.1943.tb03859.x
[10]
Witherby H. F., 1940, HDB BRIT BIRDS, V5