Water supply and wastewater disposal in developing countries :  Proceedings of a Water Supply and Sanitation Seminar held in Bangkok 19-23 Jan, 1970 / 
edited by M.B. Pescod and D. A, Okun. 
 - Bangkok :  Asia Institute of Technology,  1971. 
 - 309 p. :  ill. ;  25 cm. 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Underdeveloped areas--Water supply--Congresses.<br/>Underdeveloped areas--Sewage disposal--Congresses.