TY  - BOOK
AU  - Poulos, Christine
TI  - A Guide to water and sanitation sector impact evaluations 
SN  - Doping Impact Evaluation ; no.4
U1  - 363.61 POU 
PY  - 2006///
CY  - [Washington DC. 
PB  -  The World bank
KW  - Water and sanitation
ER  -