Mackenzie, John P. S. Birds of prey / John P. S. Mackenzie. - Ashland, Wis : Paper Birch Press, 1986. - 144 p. : ill. ; 30 cm. - Birds of the world . Open access. ISBN: 0961396180 LCCN: 8662790 Subjects--Topical Terms: Birds of prey--Pictorial works.