New world vultures' with old world affinities? : a review of fossil and recent gypaetinae of both the old and the new world - Rich, Pat Wickers (Basel : S. Karger, 1980)
Bibliography: p. 113-115
Keywords: Vultures -- Evolution; Birds of prey -- Evolution; Vultures -- Anatomy; Birds of prey -- Anatomy; Birds -- Evolution; Birds -- Anatomy; Birds, Fossil