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Substitution possibility between unpriced pulp and wastepaper in the US paper and paperboard industry
Lee, Myunghun, (2001)
Substitution Possibility between Unpriced Pulp and Wastepaper in the U.S. Paper and Paperboard Industry
The effect of sulfur regulations on the US electric power industry : a generalized cost approach
Lee, Myunghun, (2002)