Study on Crop Responses to Various Types of Fertilizers and their future requirements in Pakistan 

 - Rawalpindi:  The Manager;   1967 
 - Vol. :   ill. ;  23 cm.  
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Gov. Doc. Class. No.: </label>PAK AGR 12 Vol. 06