Smith, R. 1993. "Crisis Under the Canopy." Quito, Ecuador: Abya-Yala.

Smith, Richard D. 1973. "Southern Barasano Grammar." 3: Summer Institute of Linguistics.

Smeets, Ineke. A Mapuche Grammar. PhD thesis, Rijksuniversiteit te Leiden, 1989.

Smeets, Ineke. 2008. "A Grammar of Mapuche." 41: Mouton de Gruyter.

Gerdel, Florence L. and Marianna C. Slocum. 1976. "Páez Discourse, Paragraph and Sentence Structure." In Discourse grammar: Studies in indigenous languages of Colombia, Panama, and Ecuador, part 1, edited by Robert E. Longacre and Frances Woods. 52(1): 259-443. Summer Institute of Linguistics and University of Texas at Arlington.

Slocum, Marianna C. 1972. "Cómo Se Dice En Páez? (Gramática Pedagógica Páez-castellano)." 96. Ministerio de Gobierno.

Slocum, Marianna C. 1986. "Gramática Páez." vii+171. Editorial Townsend.

Skottsberg, Carl. 1913. "Observations On the Natives of the Patagonian Channel Region." In American Anthropologist, N.S., 15 , no. 4: 578-616.

Sinn, Adele. 2006. "Die Verschriftung Des Yanomami: Ein Bilinguales Und Interkulturelles Schulmodell." Innsbruck: Universität Innsbruck.

Simson, A. 1879. "Vocabulary of the Zaparo Language." In Journal of the Royal Anthropological Institute of Great Britain and Ireland, 8: 223-227.