Referencia bibliográfica:
Charles Stanish, Henry Tantaleán, Benjamin T. Nigra, and Laura E. Griffin. "A 2,300-year-old architectural and astronomical complex in the Chincha Valley, Peru," PNAS.
mie, 07 mayo 2014 09:08 CDT
http://es.sott.net/article/27903-Hallan-figuras-en-un-valle-de-Peru-tres-siglos-mas-antiguas-que-las-lineas-de-Nazca