Rybczynski, Witold. <br/><br/>
Low-cost technology options for sanitation: a state of the -art review and annotated bibliography / by Witold Rybczynsk-i, Chongrak Polprasert, and Michael McGarry. 

 - Washington : World Bank 
 - [186] p. 
 - World bank technical paper. Appropiate technology for water- supply and sanitation; 4 .