@article {,
	title = {Llama caravans of the Andes},
	journal = {Natural history},
	volume = {90},
	number = {12},
	year = {1981},
	note = {Source of data: Anthropological Literature, Harvard University},
	pages = {62-73},
	publisher = {New York},
	keywords = {Andes--Technology--Transportation--Pack transportation, Aymara--Eco ant--Commerce, Aymara--Sociology--Pastoralism},
	author = {West, Terry L.}
}