Branks, Thomas and Branks, Judith. 1973. Sistemas Fonol'ogicos de Idiomas Colombianos. (2.) Ministerio de Gobierno. 39–56pp.
@book{1855_branks1973, author = {Branks, Thomas and Branks, Judith}, booktitle = {Sistemas Fonol'ogicos de Idiomas Colombianos}, pages = {39–56}, publisher = {Ministerio de Gobierno}, title = {Fonolog'ia del guambiano}, volume = {2}, year = {1973} }