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Water Pollution Control: A Guide to the Use of Water Quality Management Principles

by Richard Helmer, Ivanildo Hespanhol

ISBN 13: 9780419229100

Format: Paperback (520 pages)
Publisher: Taylor & Francis
Published: 02 Oct 1997

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Surveillance of Drinking Water Quality in Rural Areas

by Barry Lloyd, Richard Helmer

ISBN 13: 9780582063303

Format: Paperback (192 pages)
Publisher: Longman
Published: 13 May 1991

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