Oscar W. Gupton

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1. Oscar W. Gupton

   Author of Wildflowers of the Shenandoah Valley and Blue Ridge Mountains, Trees and Shrubs of Virginia, Wildflowers of Tidewater Virginia

2. National Audubon Society

   Author of National Audubon Society Field Guide to North American Trees: Eastern Region, National Audubon Society Field Guide to North American Insects and Spiders, National Audubon Society Field Guide to North American Reptiles and Amphibians

3. Keith Frye

   Author of Roadside Geology of Virginia (Roadside Geology Series)

4. Edward Knobel

   Author of Field Guide to the Grasses, Sedges, and Rushes of the Northern United States

5. William A. Niering

   Author of National Audubon Society Field Guide to North American Wildflowers: Eastern Region, Wetlands (Audubon Society Nature Guides)

6. Richard J. Shaw

   Author of Plants of Waterton-Glacier National Parks and the Northern Rockies

7. May Theilgaard Watts

   Author of Tree Finder, Winter Tree Finder (Nature Study Guides)

8. Boughton Cobb

   Author of Ferns (Peterson Field Guides)

9. Lawrence Newcomb

   Author of Newcomb's Wildflower Guide

10. William S. Justice

    Author of Wild flowers of North Carolina

11. Herbert Spencer Zim

    Author of Fishes: A Guide to Familiar American Species, A Guide to Everglades National Park and the Nearby Florida Keys

12. David Allen Sibley

    Author of The Sibley Guide to Birds, The Sibley Guide to Bird Life & Behavior

13. John Eastman

    Author of The Book of Forest and Thicket: Trees, Shrubs, and Wildflowers of Eastern North America

14. Susannah Lawrence

    Author of The Audubon Society Field Guide to the Natural Places of the Mid-Atlantic States: Inland

15. Helmut Sick

    Author of Birds in Brazil

16. Allan D. Cruickshank

    Author of Birds Around New York City: Where and When to Find Them

17. F. Schuyler Mathews

    Author of Field Book of American Wild Flowers

18. Cristol Fleming

    Author of Finding Wildflowers in the Washington-Baltimore Area (Johns Hopkins Paperback)

19. Eliot Porter

    Author of The Birds of North America: A Personal Selection

20. Julian A. Steyermark

    Author of Flora of Missouri