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Natural Resources Forum > 39 > 3-4 > 191 - 201
The Geographical Journal > 180 > 2 > 120 - 129
Natural Resources Forum > 38 > 1 > 1 - 13
Natural Resources Forum > 39 > 3-4 > 191 - 201
The Geographical Journal > 180 > 2 > 120 - 129
Natural Resources Forum > 38 > 1 > 1 - 13