Opie, John,  1934- <br/><br/>
Nature's nation :  an environmental history of the United States / 
John Opie 
 - Fort Worth :  Harcourt Brace College Publishers,  1998. 
 - xxii, 517 p. :  ill., maps ;  23 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0155002198  Hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental policy--History.--United States
<br/><br/><label>Subjects--Geographic Terms: </label><br/>United States--Environmental conditions--History.