TY  - BOOK
ED  - U.S. Department of Commerce. National Bureau of Standards.
ED  - Conference on Publicly Supplied Potable Water (April 14-15 1981: Denver)
TI  - Proceedings of the National Water Conservation
PY  - 1982///
CY  - Washington : 
PB  - U.S. Government Printing Office, 
KW  - TRATAMIENTO DE AGUAS
KW  - AGUA POTABLE
ER  -