Williams, Moyle Strayhorn <br/><br/>
Crop production levels and fertilizer use / 
Moyle Strayhorn Williams & John W. Couston 
 - Rome :      FAO ,  1962 
 - xiv, 48p. :  ill. ;  20 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers<br/>Crop yield<br/>Agriculture
<br/><br/><label>Dewey Class. No.: </label>631.8  / FAO