南京林业大学学报（自然科学版）
Contingent Valuation of Yangtze River’s Water Quality Improvement Structured by Payment Card Questionnaires
CAI Zhi-jian, ZHANG Wei-wei
JOURNAL OF NANJING FORESTRY UNIVERSITY . 2006, (06): 27 -31 .  DOI: 10.3969/j.jssn.1000-2006.2006.06.006

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