As the first significant anthropological descriptions of northeastern Siberia, the publications of the Jesup North Pacific Expedition, undertaken in the first years of the 20th century, marked not only the beginning of a new era of research in Russia. Jochelson's work The Yakut, for which he draw on results of his earlier fieldwork in that area, was an important milestone for Russian and North American anthropology that provides to this day a unique contribution to thoroughly understanding the cultures of the northeastern Siberia.

In “A Russian-Yakut-Ewenki Trilingual Dictionary” by N.V. Sljunin, José Andrés Alonso de la Fuente offers the philological edition of a very early twentieth-century source of two indigenous languages from Siberia. This edition includes the facsimile of the original handwritten document. Whereas specialists have known about the existence of Sljunin’s Yakut data by indirect references to it in at least one standard dictionary, there was no available information regarding Sljunin’s Ewenki data. Furthermore, careful linguistic analysis reveals that the Ewenki variety reflected in Sljunin’s dictionary may have already dissapeared.

Interrelationship, manners and customs of peoples of north Asia.