@inbook {, title = {Ecological duality and the role of the center: Northern Potos{\'\i}}, booktitle = {Andean Ecology and Civilization}, year = {1985}, note = {ethnic economies, ethnic strips. individual groups control parallel strips ranging from lowland agriculture to puna grassland}, pages = {311-335}, publisher = {University of Tokyo Press}, organization = {University of Tokyo Press}, address = {Tokyo}, keywords = {adaptation ecology altitude verticality domestication pastoralism agriculture camelids tubers}, author = {Harris, Olivia}, editor = {Masuda, Shozo and Shimada, Isumi and Morris, Craig} }