by Lorbiecki, Marybeth.
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On a farther shore : the life and legacy of Rachel Carson
The father of American conservation : George Bird Grinnell, adventurer, activist, and author
The invention of nature : Alexander von Humboldt's new world
The wilderness warrior : Theodore Roosevelt and the crusade for America, 1858-1919
A passion for nature : the life of John Muir
The Wilderness Warrior : Theodore Roosevelt and the Crusade for America
Wild things, wild places : adventurous tales of wildlife and conservation on planet Earth
Guardians of the valley : John Muir and the friendship that saved Yosemite
Nature writings
English
1st ed.
Leopold, Aldo, > 1886-1948.
Naturalists > Wisconsin > Biography.
Conservationists > Wisconsin > Biography.