Birds in peril : a guide to the endangered birds of Canada and the United States
1977
Mackenzie, John P. S. |
Animal protection
The conservation of the great bustard in Portugal
1980
Collar, N. J. |
Goriup, Paul D. |
Gli uccelli e la loro protezione
1957
Toschi, Augusto |
Birds of prey in Europe
1974
Bijleveld, Maarten |
Biology and conservation of sea turtles : proceedings of the World Conference on Sea Turtle Conservation, Washington, DC, 26-30 November 1979
1981
Bjorndal, Karen A. |
Peregrine falcon populations : their biology and decline
1969
Hickey, Joseph J. |
Waterfowl tomorrow
1964
Linduska, Joseph L. |
Salvemos las aves
1987
Schreiber, Rudolf |
Animal rights vs. nature
1990
Howard, Walter E. |