Utilization of nitrogen and its compounds by plants / 
Socity for Expreimental Biology 
 - Cambridge :  The University,  1959 
 - vi ,385 p. , [6] leaves of plates :  ill ;  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Government productivity<br/>Temporary employees
<br/><br/><label>Dewey Class. No.: </label>581.8761082