An introduction to agricultural chemistry 
by J. S. Willcox, W. N. Townsend 
 - 3rd ed. 
 - London  Edward Arnold  1964 
 - 243 p. : ill. ; 20 cm. 
<br/><br/><label>LCCN: </label>53-008780 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural chemistry