Wadsworth, Ginger <br/><br/>
John Muir :  Wilderness Protector. 

 - Minneapolis :  Lerner Publications,  1992. 
<br/><br/> A biography of the naturalist and explorer who helped found the Sierra Club and was influential in the development of our national park system. 
<br/><br/><label>ISBN: </label>0-8225-4912-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Muir, John--Literature--Naturalists--United States--Biography--Conservationists--United States--Biograp