| April, 1999 | |
| November, 1998 | WRI and The World Conservation Union (IUCN)
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| October, 1998 | Lori Ann Thrupp
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| August, 1998 | Jake Brunner, Kirk Talbot, and Chantal Elkin |
| June, 1998 | Allen Hammond |
| June, 1998 | Dirk Bryant, Lauretta Burke, John McManus, and Mark Spalding
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| June, 1998 | Deanna M. Wolfire, Jake Brunner, and Nigel Sizer
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| May, 1998 | A joint publication by the World Resources Institute, the United Nations Environment Programme, the United Nations ... |
| April, 1998 | Marta Miranda with Alberto Blanco-Uribe Q., Lionel Hernández, José Ochoa G., and Edgard Yerena
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| January, 1998 | Richard Matthew and George Shambaugh, Georgetown University
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