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- [2] Multivariate Mixed Models for Open-Ended Contingent Valuation Data: Willingness To Pay For Conservation of Monk Seals [J]. Environmental and Resource Economics, 1998, 12 : 443 - 456
- [3] Multivariate mixed models for open-ended contingent valuation data - Willingness to pay for conservation of monk seals [J]. ENVIRONMENTAL & RESOURCE ECONOMICS, 1998, 12 (04): : 443 - 456