Loukotka, Čestmír. 1968. Classification of South American indian languages. In Wilbert, Johannes (ed.) Los Angeles: Latin American Center, University of California.
@book{loukotka1968classification, address = {Los Angeles}, author = {Loukotka, Čestmír}, editor = {Wilbert, Johannes}, publisher = {Latin American Center, University of California}, title = {Classification of South American indian languages}, year = {1968} }