Salvemos las aves
1987
Schreiber, Rudolf |
Birds
A coloured key to the wildfowl of the world
1961
Scott, Peter |
Aves y plantas de Lanzarote en peligro de extinción
1991
Sosa, Kunkel |
Sosa, Cardona |
Birds of prey
1964
Sokotowski, Jan |
The secrets of the eagle and of other rare birds
1925
Gilbert, H. A. |
Brook, Arthur |
Eagles of the world
1976
Brown, Leslie |
The birds
1969
Peterson, Roger Tory |
Lambert's birds of garden and woodland
1976
Lambert, Terence |
Mitchell, Alan |
Bird migration
1964
Griffin, Donald R. (Donald Redfield) |
Farming and birds
1986
O'Connor, Raymond J. |
Shrubb, Michael |