TY  - BOOK
AU  - Ellms,Joseph W.
TI  - Water purification,
U1  - 628.352 
PY  - 1917///
CY  - New York
PB  - McGraw-Hill book company, inc.; [etc., etc.]
KW  - Water
KW  - Purification
KW  - MCE
N1  - References at end of each chapter
ER  -