Chopra, S. L. <br/><br/>
Analytical agricultural chemistry / 
S. L. Chopra and J. S. Kanwar 
 - 3rd ed. 
 - New Delhi :  Kalyani Pub.,  1980 
 - xiii, 518 p. :  ill. :  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agricultural chemistry