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GUPTA I, JOSHI D C, . (2000). INDUSTRIAL WASTE WATERS AND ENVIRONMENTAL POLLUTION. JODHPUR: SCIENTIFIC PUBLISHERS.
GUPTA I, JOSHI D C, . 2000. INDUSTRIAL WASTE WATERS AND ENVIRONMENTAL POLLUTION. JODHPUR: SCIENTIFIC PUBLISHERS.
GUPTA I, JOSHI D C, . INDUSTRIAL WASTE WATERS AND ENVIRONMENTAL POLLUTION. JODHPUR: SCIENTIFIC PUBLISHERS. 2000.