Environmental Protection

Birds of Britain

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

Shoshone National Forest, Wyoming

Whale Primer, with Special Attention to the California Gray Whale

Buster Bear's Twins

The English Lakes

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

Poisonous Snakes of Kansas

The Incredible Travel Tales of John Muir (Illustrated Edition)

Everglades Wildguide

The Falls of Niagara and Other Famous Cataracts

In Nesting Time

The Web of Life

Descriptions of New Hylid Frogs From Mexico and Central America

Wild Life at the Land's End

The Water-Finders

Herbs and Apples

Industrial Scrubber Systems

The Hurricane Guide

Woodland Gleanings: Being an Account of British Forest-Trees