Vulnerable concentrations of birds in the North Sea
1987
Birds
Seabirds in the North Sea : final report
1987
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1987
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Plachter, Harald |
Nids et oeufs des oiseaux d'Europe centrale et occidentale
1973
Hoeher, Siegfried |
Birds of prey in Europe
1974
Bijleveld, Maarten |
The geographical distribution and status of birds in Scotland
1928
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Rintoul, Leonora Jeffrey |
A natural history of British birds
1983
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1966
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The popular handbook of British birds
1952
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