United States, <br/><br/>
Environmental quality: the second annual report 

 - 
 -  Washington DC  1971 
 - xxiv,360p   
<br/><br/>   
<br/><br/><label>ISBN: </label>
<br/><br/><label>ISSN: </label>
<br/><br/><label>Subjects--Index Terms: </label>Environmental sciences 
<br/><br/><label>Dewey Class. No.: </label>577.4(047)(73)