Marquis, Ralph William,  comp., <br/><br/>
Environmental improvement;  air, water, and soil, 
edited by Ralph W. Marquis. 
 - [Washington]  Graduate School, U.S. Dept. of Agriculture  [1966] 
 - vii, 105 p.  ports.  23 cm. 
<br/><br/> Text of the lectures presented at the lecture series, Environmental improvement, U.S. Dept. of Agriculture, May 1966. 
<br/><br/><label>LCCN: </label>agr67000144  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution.
<br/><br/><label>LC Class. No.: </label>TD180  / .M3 
<br/><br/><label>Dewey Class. No.: </label>628 
<br/><br/><label>National Agricultural Library Call No.: </label>aTD180.A2M3