@inbook {,
	title = {Problemas iniciales},
	booktitle = {Collaguas 1},
	year = {1977},
	note = {cited in Burger 1998 Andean Past 5, Chivay Source Obsidian article},
	pages = {131-167},
	publisher = {Pontificia Universidad Cat{\'o}lica Fondo Editorial},
	organization = {Pontificia Universidad Cat{\'o}lica Fondo Editorial},
	address = {Lima},
	author = {Pease G. Y, Franklin},
	editor = {Pease G. Y, Franklin}
}