TY  - BOOK
AU  - Ryan,William John
TI  - Water treatment and purification,
SN  - 8177540025
AV  - TD430 .R85
PY  - 1937///
CY  - New York, London
PB  - McGraw-Hill book company
KW  - Water
KW  - Purification
KW  - Feed-water purification
N1  - "Selected bibliography" at end of most of the chapters
ER  -