Karalus, Karl E. books & textbook
The Owls of North America, North of Mexico: All the Species and Subspecies Illustrated in Color and Fully Described
Eckert, Allan W. Karalus, Karl E.
Doubleday Books /1974-08T Hardcover / 278 Pages
isbn-10: 0385048181 / isbn-13: 9780385048187
Owls Of North America (North of Mexico)
Weathervane Books /1988-09-26 Hardcover / 278 Pages
isbn-10: 0517632209 / isbn-13: 9780517632208
