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Resource and Energy Economics > 2003 > 25 > 1 > 59-79
Structural Change and Economic Dynamics > 2002 > 13 > 4 > 415 - 433
Resource and Energy Economics > 2003 > 25 > 1 > 59-79
Structural Change and Economic Dynamics > 2002 > 13 > 4 > 415 - 433