Projeto de Idiomas em Risco de Extinção - Santiago del Estero Quechua - Observations of the Quechuan Language from the Etymological Dictionary of Corominas

This Spanish paper from 1971 observes phonemes of the Quechuan dialects, including the dialect from the Santiago del Estero Region. The regions from where the languages came from are discussed, and also mentioned is how their linguistic characteristics were formed.