Hunger signs in crops :  a symposium / 
edited by Howard B. Spraque. 
 - New 3rd ed. 
 - New York :  David McKay Company,  1964. 
 - 461 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Deficiency diseases in plants.