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Forest Policy and Economics > 2008 > 10 > 4 > 248-256
Technovation > 2002 > 22 > 8 > 517-524
Technovation > 2001 > 21 > 8 > 501-514
Forest Policy and Economics > 2008 > 10 > 4 > 248-256
Technovation > 2002 > 22 > 8 > 517-524
Technovation > 2001 > 21 > 8 > 501-514