TY  - BOOK
AU  - Kalbermatten,John M.
TI  - Appropriate technology for water supply and sanitation: technical and economic options 
T2  - Appropriate technology for water supply and waste disposal
PY  - 1980///
CY  - [S.l.]
PB  - World Bank
UR  - http://www.amazon.com/exec/obidos/ASIN/B0006XTRCI/chopaconline-20
ER  -