Drainage of agricultural land / 
Prepared by Officials of the Soil Conservation of Science. 
 -  U.S. Department of Agriculture,  c1973. 
 - 430 pages :  Illustrations ;  26 cm. 
<br/><br/> "Reproduced ... from section 16--drainage of agricultural land of the national engineering handbook ... issued in 1971 by the Soil Conservation Service, U.S. Department of Agriculture." 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drainage.
<br/><br/><label>LC Class. No.: </label>S621  / .U64 
<br/><br/><label>Dewey Class. No.: </label>631.6/2