共 10 条
[1]
Cochrane WG, 1963, SAMPLING TECHNIQUES
[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
[5]
MAXWELL AE, 1961, ANALYSING QUALITATIV
[7]
Taylor S. M., 1965, Bird Study, V12, P268
[8]
Williamson K., 1964, Bird Study, V11, P1
[9]
Williamson K., 1965, Bird Study, V12, P349
[10]
Williamson K., 1964, Bird Study, V11, P240