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- A field guide to trees and shrubs;, field marks of all trees, shrubs, and woody vines that grow wild in the northeastern and north-central United States and in southeastern and south-central Canada,, by George A. Petrides. Illus. by George A. Petrides [and] Roger Tory Peterson
- Families of birds, by Oliver L. Austin, Jr. ; illustrated by Arthur Singer ; original project editor, Herbert S. Zim
- A field guide to freshwater fishes, North America north of Mexico, Lawrence M. Page, Brooks M. Burr ; illustrations by Eugene C. Beckham III, John Parker Sherrod, Craig W. Ronto