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| Utgitt
| London : London Environmental Economics Centre , 1989
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| Omfang
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| Opplysninger
| "This paper is based on two papers prepared by Edward B. Barbier, "The demand for unworked ivory: a case study of Japan", and "The demand for unworked ivory: a case study of Hong Kong", Economics working paper ITRG/EG 89-09, April 1989."
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