How to Know the Butterflies: Illustrated Keys for Determining to Species All Butterflies in North America, North of Mexico, With Notes on Their Distribution, Habits, and Larval Food, and Suggestions for Collecting and Studying Them (Classic Reprint) Ehrlich, Paul R. Heftet / 2019 / Engelsk
How to Know the Butterflies: Illustrated Keys for Determining to Species All Butterflies in North America, North of Mexico, With Notes on Their Distribution, Habits, and Larval Food, and Suggestions for Collecting and Studying Them (Large Text Ehrlich, Paul R. Heftet / 2019 / Engelsk
On the Wings of Checkerspots A Model System for Population Biology Ehrlich, Paul R. Innbundet / 2004 / Engelsk
Killing the Koala and Poisoning the Prairie Australia, America, and the Environment Bradshaw Corey J. A. Heftet / 2015 / Engelsk
Before They Vanish Saving Nature's Populations — and Ourselves Ehrlich, Paul R. Innbundet / 2024 / Engelsk
Called by the Wild The Autobiography of a Conservationist Dasmann, Raymond Innbundet / 2002 / Engelsk
