By Hem L.J.   Efraimsen H.   in Water Research

ISSN:0043-1354|35|4|1106-1110

Elsevier‎(2001)‎

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By Numazawa M.   Yamada K.   Hem L.J.   Efraimsen H.   in Environment International

ISSN:0160-4120|25|2|367-371

Elsevier‎(1999)‎

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