Programme of activities to be carried on by the chief Engineer of the P.H. Engineering Directorate, E. Bengal with the Co-Operation of Dr. R. Pavenello, Sanitary Engineer, WHO.  
 File No.  2E-123/49 

 -  1949 
 - 26 P.  H-35 cm; W-22 cm 
<br/><br/> সচিবালয় রেকর্ডরুম সংগ্রহ (প্রথম পর্যায়) <br/><br/> 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sanitary