Yde, Jeus, 1948, The regional Distribution of South American Blowgun Types, Journal de la Société des Américanistes, XXXVII:275-317.

Young, Nathaniel, is reported to have collected blood samples of the Isconahua in 1961 (Whiton Per. Exp.). Dept of Anth. & School of Medicine, Yale University, New Haven, Connecticut.

Yuimaki, Um Jornal Indigena do Acre, Rio Branco. [First issue march-april 1991.]