共 23 条
[2]
CADBURY CJ, 1989, BIRDS COLL TIREE STA, P51
[3]
Collar N.J., 1988, BIRDS WATCH ICBP CHE
[4]
Cramp S., 1980, HDB BIRDS EUROPE MID, V2
[5]
FISHER G, 1963, REPORT ROYAL ZOOLOGI, V51, P13
[7]
GREEN RE, 1994, 3RD EUR FOR BIRDS PA
[8]
Groombridge B., 1994, 1994 IUCN RED LIST T
[9]
HUDSON A V, 1990, British Birds, V83, P173
[10]
LANCE AN, 1990, P BRIT ECOLOGICAL SO