G. (editors) (1997) Mesozoic Geology and Paleontology of the Four Corners Region.'' New Mexico Geological Society Forty-Eighth Annual Field Conference. Gerhardt, K. M., Lacey, P. F., McBride, R., and McBride, D. Raw lithic material sources near the Greenlee Site. Retrieved May, 2009. Gibbon, Guy E.; Ames, Kenneth M. (1998) Archaeology of Prehistoric Native America: An Encyclopedia. . External links Canyons of the Ancients National Monument (Bureau of Land Management) Canyons of the Ancients National Monument Recreational Map Crow Canyon Archaeological Center, Describes sites in the Monument National Monuments in Colorado Bureau of Land Management National Monuments Bureau of Land Management areas in Colorado Ancient Puebloan archaeological sites in Colorado Native American history of Colorado Protected areas of Dolores County, Colorado Protected areas of Montezuma County, Colorado Oasisamerica cultures Puebloan buildings and structures Ruins in the United States Archaeological sites on the National Register of Historic Places in Colorado National Register of Historic Places in Montezuma County, Colorado 2000 establishments in Colorado Protected areas established in 2000 Units of the National Landscape Conservation System