By Haule K.S.   Johnsen F.H.   Maganga S.L.S.   in Journal of Environmental Management

ISSN:0301-4797|66|1|31-42

Academic Press‎(2002)‎

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By Mwaseba D.L.   Kaarhus R.   Johnsen F.H.   Mvena Z.S.K.   Mattee A.Z.   in Outlook on Agriculture

ISSN:0030-7270|35|4|263-272

IP Publishing Ltd‎(2006)‎

Access to resources Favorite 9.056488