Balls, William Lawrence. <br/><br/>
The yields of a crop :  based on an analysis of cotton-growing by irrigation in Egypt / 
William Lawrence Balls. 
 - London :  E. & F.N. Spon,  1953. 
 - xv, 144 p. :  ill. ;  22 cm. 
<br/><br/> Includes index 
<br/><br/>Bibliography : p.127-134. 
<br/><br/>392  392 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Field & plantation crops
<br/><br/><label>Dewey Class. No.: </label>633.5 / B214y