A field guide to the birds of Britain and Europe Author(s) Peterson, Roger Tory Mountfort, Guy Hollom, P. A. D. (Philip Arthur Dominic)
A field guide to the mammals : field marks of all species found North of the Mexican boundary Author(s) Burt, William Henry Grossenheider, Richard Philip
A field guide to western birds : field marks of all species found in North America west of the 100th meridian, with a secion on the birds of the Hawaiian Islands Author(s) Peterson, Roger Tory
