@book{43481, author = {Ponce Sangines, Carlos and Mogrovejo Terrazas, Gerardo}, title = {Acerca de la procedencia del material litico de los monumentos de Tiwanaku / }, publisher = {Academia Nacional de Ciencias de Bolivia, }, year = {1970.}, series = {Academia Nacional de Ciencias de Bolivia ; no. 21}, address = {La Paz : } }