Proceeding of the workshop on efficient systems at the farm level in china 
United Nations 
 - New York :  United Nations,  1979. 
 - v,108 :  ill. ;  30cm. 
 - Resources series; 51 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Irrigation engineering--China--Congresses<br/>Irrigation--China--Congresses<br/>Water resources development--China--Congreses<br/>Irrigation engineering--Asia<br/>southeastern--congresses<br/>Water resourses development--Asia<br/>southeastern--Congresses
<br/><br/><label>LC Class. No.: </label>PAM QTO TC901.W67