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Ready, Richard, Navrud, Stale, Day, Brett, Dubourg, Richard, Machado, Fernando, Mourato, Susana 
ORCID: 0000-0002-9361-9990, Spanninks, Frank and Vlazquez Rodriquez, Maria xose
(2004)
Contingent valuation of ill health caused by pollution: testing for context and ordering effects.
Portuguese Economic Journal, 3.
pp. 145-156.
ISSN 1617-982X
