Hays, Samuel P. <br/><br/>
Beauty, health, and permanence :  environmental politics in the United States, 1955-1985 / 
Samuel P. Hays in collaboration with Barbara D. Hays 
 - Cambridge [Cambridgeshire] :  Cambridge University Press,  1987 
 - xv, 630 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references (p. 544-604) and index 
<br/><br/><label>ISBN: </label>0521324289 (hbk.) 0521389283 (pbk.) 9780521389280 (pbk.) :  hadiah 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental policy--History--United States<br/>Environmental protection--History--United States