共 10 条
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- [2] DOBINSON H. M., 1964, BRIT BIRDS, V57, P373
- [3] ENEMAR A, 1959, VAR FAGELVARLD S2, V18
- [4] HUBAND P, 1966, 6 GAM RES ASS ANN RE, P38
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- [8] Williamson K., 1964, Bird Study, V11, P1
- [9] Williamson K., 1965, Bird Study, V12, P349
- [10] Williamson K., 1964, Bird Study, V11, P240