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Handbook of drinking water quality : standards and controls
(Van Nostrand Reinhold, 1990)
Principles of hydrology
(McGraw-Hill, 1990)
Standard handbook of environmental engineering
(McGraw-Hill, 1990)
Yearbook of the Federal Republic of Germany : calendar year 1987
(Federal Institute of Hydrology and the German Research Association, 1990)
Researches on integrated water management in urban areas in Japan
(Japanese National Committee on IHP, 1990)
Water quality and treatment : a handbook of community water supplies
(McGraw-Hill, 1990)
Nature & Resources : water quality and availability
(UNESCO, 1990)
The water encyclopedia
(Lewis Publishers, 1990)