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1Almmustuhtton 1999Fáttát “...Environmental policy Economic aspects New Zealand....”
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2Dahkki Rae, Allan N.Fáttát “...Environmental policy Economic aspects New Zealand....”
Almmustuhtton 1996
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3Dahkki Hewison, Grant J.Fáttát “...Environmental policy Economic aspects New Zealand....”
Almmustuhtton 1995
Girji