| March, 2005 | Lauretta Burke, Jonathan Maidens y autores contribuyentes: Mark Spalding, Philip Kramer, Edmund Green, Suzie ... |
| April, 2002 | World Resources Institute |
| January, 2003 | Elena Petkova and Gloria Bruce, editors |
| June, 2004 | |
| August, 2007 | Zachary Sugg |
| June, 2007 | Susan Minnemeyer, Benoit Mertens, Lawrence Ayenika Nsoyuni, Matthew Steil |
| October, 2002 | Lars Laestadius, Dmitry Dobrynin, Alexander Isaev, et. al. |
| February, 2003 | Suzie Greenhalgh and Amanda Sauer |
| December, 1996 | Kenton R. Miller
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| November, 2009 | Janet Ranganathan, Frances Irwin, and Cecilia Procopé Repinski
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