Environmental Protection

Descriptions of New Hylid Frogs From Mexico and Central America

Earthworms and Their Allies

Stray Leaves from an Arctic Journal

The Water-Finders

Freckles from the Marvelous Forest

The Hurricane Guide

Wild Spain (España agreste)

Michigan Trees: A Handbook of the Native and Most Important Introduced Species

Birds of Britain

Grand Teton: A Guide to Grand Teton National Park, Wyoming

A Thousand-Mile Walk to the Gulf (With Original Drawings & Photographs)

A voyage to Spitzbergen

Buster Bear's Twins

The Geology of Button Bay State Park

Poisonous Snakes of Kansas

Everglades Wildguide

The Incredible Travel Tales of John Muir (Illustrated Edition)

Shoshone National Forest, Wyoming

Cactus Forest Drive, Saguaro National Monument

The English Lakes