Oklahoma Nature Set: Field Guides to Wildlife, Birds, Trees & Wildflowers of Oklahoma (Pocket Naturalist Guide)

Oklahoma Nature Set: Field Guides to Wildlife, Birds, Trees & Wildflowers of Oklahoma (Nature Observation North America)

Snakes of the Great Plains-Kansas, Nebraska, Oklahoma and the Texas Panhandle: A guide to Common and notable Species (Guide to Common & Notable Species)

Freshwater Fishes of Oklahoma: A Guide to Game Fishes