Thompson, Louis M. <br/><br/>
Soils and soil fertility / 
Louis M. Thompson, Frederick R. Troeh. 
 - 4th ed. 
 - New York :  McGraw-Hill,  c1978. 
 - xi, 516 p. :  ill. ;  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Soil science.<br/>Soil fertility.
<br/><br/><label>Dewey Class. No.: </label>631.4