Report for the year 1971 Volume II :( physics division) /  . / 
Irrigation research institute 
 - Lahore:  Irrigation research institute,  1998 
 - Various Pages:  Illustrations, Graphs; 
<br/><br/><br/>In English 
<br/><br/> Pbk. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>annual report
<br/><br/><label>Dewey Class. No.: </label>530 REP 1971