Bibliografía (22 obras)
Field Guide to the Birds of Britain and Europe
2001
Memories of Three Lives
1996
Ongerept India
1991
Wild India
Rare birds of the world
1989
1988
Saving the tiger
1980
Back from the brink
1978
So small a world
1974
Tigers
1973
The vanishing jungle
1969
Portrait of a desert
1963
The wild Danube
Portrait of a river
1962
Wild paradise
1958
Portrait of a wilderness
Europas fåglar
Guida degli Uccelli d'Europa
The hawfinch
1957
Guia de campo de las aves de España y demás países de Europa
Guide des oiseaux d'Europe
A field guide to the birds of Britain and Europe
1954
