General Information about Coca Leaf:
http://en.wikipedia.org/wiki/Coca
Cultural Traditions, Legal Issues, and Coca Leaf:
http://www.visionchamanica.com/antigua/yage_EMC/Mambe-Coca-Integral.htm
Mambe: De la Maloca a la Universidad, by Carlos Suarez
http://www.elespectador.com/impreso/cuadernilloa/internacional/articuloimpreso-coca-el-dilema-andino
La Coca, El Dilema Andino: Penalizar el mambeo de la hoja o revisar los convenios internacionales, by Juan Camilo Maldonado T. El Espectador.
http://www.undrugcontrol.info/en/issues/unscheduling-the-coca-leaf
http://www.tni.org/primer/coca-leaf-myths-and-reality
http://www.nytimes.com/1988/07/01/business/how-coca-cola-obtains-its-coca.html
How Coca Cola Obtains its Coca, by Clifford D. May