Mitchell Robert Cameron Using surveys to value public goods The contigen valuation method - Washington Resources for the future U. S. A. 1989 - xix, 463p. Bib. p.383-434; Appendix p.310-82 cm. ISBN: 0 915 707322 Source: General Book Subjects--Topical Terms: Value Dewey Class. No.: X:7, M9/TD3