By van den Berg A.E.   Koole S.L.   van der Wulp N.Y.   in Journal of Environmental Psychology

ISSN:0272-4944|23|2|135-146

Elsevier‎(2003)‎

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By van den Berg A.E.   Vlek C.A.J.   Coeterier J.F.   in Journal of Environmental Psychology

ISSN:0272-4944|18|2|141-157

Academic Press‎(1998)‎

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