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ISSN:1059-0560|12|2|275-281

Elsevier‎(2003)‎

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By Beard T.R.   Sweeney G.H.   Gropper D.M.   in Energy Economics

ISSN:0140-9883|17|1|53-58

Elsevier‎(1995)‎

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By Beard T.R.   Kaserman D.L.   Mayo J.W.   in International Journal of Industrial Organization

ISSN:0167-7187|21|6|831-848

Elsevier‎(2003)‎

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By Anderson S.   Beard T. R.   Kim H.   Stern L. V.   in Applied Economics Letters

ISSN:1466-4291|20|10|956-959

Routledge Ltd‎(2013)‎

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