00779nam a2200229 a 4500 0749261722 (pbk.) MAIN TD171.8 WAT Water. Unit 5-6, Water quality, analysis and management / Prepared by the Course Team. Water quality, analysis and management. Unit 5-6. Milton Keynes : The Open University,1992. 83 p. : ill. ; 30 cm. Environmental control and public health. Technology : a second level course. Includes bibliographical references.3 .b10131668 24-10-12 28-07-04 20230123133802.0 NUST BOOKS TD171.8 WAT 154594 154594 2023-01-23 00:00:00 12 TD171.8 WAT 92003027073 80.00 2023-01-23 BOOKS 0 LCC 0 0 NFIC 0 MAIN MAIN GEN 2023-01-23 80.00