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• Steven M. Stanley, “Earth System History.”
• http://www.oaklandzoo.org/atoz/atoz.html,
• Cusack, Chris, Margaret & Victor; Stewart, Deirdre. "Bamboo World - Species Reference List".
• Dransfield, John; Dransfield, Soejatmi; Widjaja, Elizabeth & Renuka, C. "Species of Bamboo and Rattan". 1998
• Harold F. Winters. "Coconut.” Book of Knowledge. 1998 ed.
• http://www.desert-tropicals.com/Plants/Arecaceae/Cocos_nucifera.html
• http://peace.saumag.edu/faculty/Kardas/Courses/GPWeiten/C3BioBases/Curare.html
• Michael, James U. "Flowering Plants."Encyclopedia of Gardens. 1971 ed.
• Martisson. "Classification of Snakes". The Encyclopedia of Snakes, p. 247.1995, New York.