* Effland, R. 1998. [http://www.mc.maricopa.edu/dept/d10/asb/anthro2003/glues/model_complex.html] The Cultural Evolution of Civilizations] Mesa Community College. | * Effland, R. 1998. [http://www.mc.maricopa.edu/dept/d10/asb/anthro2003/glues/model_complex.html] The Cultural Evolution of Civilizations] Mesa Community College. |