By Essien J.   Ubom R.   Antai S.   in Environmental Monitoring and Assessment

ISSN:0167-6369|121|1-3|65-75

Springer Publishing Company ‎(2006)‎

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By Essien J.P.   Ubom R.M.   in The Environmentalist

ISSN:0251-1088|23|4|323-328

Springer Publishing Company ‎(2003)‎

Access to resources Favorite 2.735147