Hawtrey, S. H. C. 1901. The Lengua Indians of the Paraguayan Chaco. Journal of the Royal Anthropological Institute 31. 280-299.
@article{hawtrey1901, author = {Hawtrey, S. H. C.}, journal = {Journal of the Royal Anthropological Institute}, key = {Hawtrey (1901)}, pages = {280-299}, title = {The Lengua Indians of the Paraguayan Chaco}, volume = {31}, year = {1901} }