| October, 1991 | Dan Tunstall, Jessica T. Mathews
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| December, 1991 | World Resources Institute
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| February, 1992 | World Resources Institute, IUCN-The World Conservation Union, United Nations Environment Programme (UNEP) in ... |
| March, 1992 | World Resources Institute in collaboration with the United Nations Environment Programme and the United Nations ... |
| June, 1992 | James J. MacKenzie, Roger C. Dower and Donald D.T. Chen
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| August, 1992 | Roger C. Dower and Mary Beth Zimmerman
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| October, 1992 | Carol H. Weiss, Ed.
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| November, 1992 | Robert Repetto, Roger C. Dower, Robin Jenkins, and Jacqueline Geoghegan
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| January, 1993 | United States Agency for International Development and WRI |
| February, 1993 | Nels C. Johnson and Bruce Cabarle
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