@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.} }