| March, 1992 | World Resources Institute in collaboration with the United Nations Environment Programme and the United Nations ... |
| February, 1992 | World Resources Institute, IUCN-The World Conservation Union, United Nations Environment Programme (UNEP) in ... |
| December, 1991 | World Resources Institute
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| October, 1991 | Dan Tunstall, Jessica T. Mathews
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| June, 1991 | Walter V. Reid and Mark C. Trexler
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| March, 1991 | Kenton Miller and Laura Tangley
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| July, 1990 | World Resources Institute, in collaboration with the United Nations Environment Programme and the United Nations ... |
| April, 1990 | Robert Repetto
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| April, 1990 | Dan Tunstall, Janet N. Abramovitz, Douglas S. Baker
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| March, 1990 | Jeffrey A. McNeely, Kenton R. Miller, Walter Reid, Russel Mittermeier, and Timothy B. Werner
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