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| | CID at Harvard University :: The Geography of Poverty and Wealth |
 | | Andrew D. Mellinger, Jeffrey D. Sachs, and John L. Gallup,"Climate, Water Navigability, and Economic Development" CID Working Paper no. 24, September 1999. |
 | | Jeffrey D. Sachs "Tropical Underdevelopment" Presented at the annual meeting of the Economic History Association September 8, 2000 in Los Angeles, California. |
 | | Gallup, John, Jeffrey Sachs, and Andrew Mellinger, "Geography and Economic Development" Presented at the Annual Bank Conference on Development Economics, World Bank. |
| www.cid.harvard.edu /cidinthenews/articles/Sciam_0301.html (725 words) |
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