By Frimpong S.   Changirwa R.   Szymanski J.   in International Journal of Surface Mining, Reclamation and Environment

ISSN:1389-5265|17|3|183-195

Taylor & Francis Ltd‎(2003)‎

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By Frimpong S.   Asa E.   Szymanski J.   in International Journal of Surface Mining, Reclamation and Environment

ISSN:1389-5265|16|2|134-143

Taylor & Francis Ltd‎(2002)‎

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By Frimpong S.   Changirwa R.   Szymanski J.   in Resources, Conservation and Recycling

ISSN:0921-3449|39|1|3-17

Elsevier‎(2003)‎

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By Frimpong S.   Szymanski J.   Changirwa R.M.M.   in Resources, Conservation and Recycling

ISSN:0921-3449|39|1|33-50

Elsevier‎(2003)‎

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By Frimpong S.   Changirwa R.M.M.   Asa E.   Szymanski J.   in International Journal of Surface Mining, Reclamation and Environment

ISSN:1389-5265|16|2|105-121

Taylor & Francis Ltd‎(2002)‎

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