| colorado.edu | Medical Geography and Cholera |
| conservationrainforesttrust.org | Conservation Rainforest Trust |
| cactus-mall.com | Sociedad Peruana De Cactus Y Suculentas |
| lava.net | Manrique International Agrotech (MIAT) |
| farmelectronics.co.uk | Potato, Onion and Vegetable Storage |
| nap.edu | Lost Crops of the Incas |
| pbs.org | The Living Edens: Manu, Peru's Hidden Rain Forest |
| ifpri.org | International Food Policy Research Institute (ifpri) - Sustainable Solutions Fo |
| icrisat.org | ICRISAT - International Crops Research Institute for the Semi-Arid Tropics |
| fao.org | Food and Agriculture Organization (FAO) |
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