Harrar, Jacob George,  1906- <br/><br/>
Principles for progress in world agricultutre : 
by J. George Harr ar 
 - New York :  Rockfeller Foundation,  1966. 
 - 16 p. ;  22 cm. 
<br/><br/> "Presented at the 33rd annual meeting of the National Agricultural C hemicals Association, White Sulphur Springs, West irginia". 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Agriculture.
<br/><br/><label>Dewey Class. No.: </label>P 630 H37