TY  - BOOK
AU  - Case,Richard B.
AU  - Ristau,Toni K.
ED  - United States.
ED  - United States.
TI  - Small water purification systems
U1  - 639.9 
PY  - 1981///
CY  - Denver, Colo.
PB  - United States Department of the Interior, Bureau of Land Management, Available from Denver Service Center
KW  - Water
KW  - Purification
KW  - Equipment and supplies
KW  - Drinking water
KW  - Standards
KW  - United States
N1  - "Division of Scientific Systems Development and Division of Engineering, Bureau of Land Management, U.S. Department of the Interior."; "July 1981."; Periodic updating anticipated
ER  -