Ospreys :
Poole, Alan Forsyth.
Ospreys : a natural and unnatural history / Alan F. Poole. - Cambridge [Cambridgeshire] ; New York : Cambridge University Press, 1989. - xviii, 246 p. : ill. ; 25 cm.
Ospreys : a natural and unnatural history / Alan F. Poole. - Cambridge [Cambridgeshire] ; New York : Cambridge University Press, 1989. - xviii, 246 p. : ill. ; 25 cm.