The Status of Birds in Britain & Ireland
Parkin, David T.; Alan G. Knox
Second Atlas of the Breeding Birds of Maryland and the District of Columbia
Ellison, Walter G.
Handbook of the Mammals of the World, Volume 1: Carnivores
Wilson, Don E.; Mittermeier, Russell A.
Utah Birds: Geographic Distribution and Systematics
BEHLE, William H.
Priority! The Dating of Scientific Names in Ornithology: Directory to the Literature & its Reviewers
DICKINSON, Edward C.; et. Al
COULSON, John C.
Birds in Africa: An Introduction and Survey to the Birdlife of Africa
Rainer Christian Ertel