Phillips, Ruth Anne; R. Sarah Richardson (December 2013). "Stone, Water, and Mortarless Constructions: Frank Lloyd Wright and the Pre-Columbian Inca". Latin Americanist. 57 (4): 97–130. doi:10.1111/tla.12011. ISSN1557-2021. S2CID143779897.
Phillips, Ruth Anne; R. Sarah Richardson (December 2013). "Stone, Water, and Mortarless Constructions: Frank Lloyd Wright and the Pre-Columbian Inca". Latin Americanist. 57 (4): 97–130. doi:10.1111/tla.12011. ISSN1557-2021. S2CID143779897.
Phillips, Ruth Anne; R. Sarah Richardson (December 2013). "Stone, Water, and Mortarless Constructions: Frank Lloyd Wright and the Pre-Columbian Inca". Latin Americanist. 57 (4): 97–130. doi:10.1111/tla.12011. ISSN1557-2021. S2CID143779897.