Eastern Siberia. 5-60.
Scale 1:6,500,000. "Base 28505." Shows railroads. Available also through the Library of Congress Web site as a raster image. AACR2
United States. Central Intelligence Agency
Gipsometricheskai︠a︡ karta Rossīĭskoĭ Imperīi : (opyt izobrazhenīi︠a︡ relʹefa Imperīi)
Relief and depths shown by gradient tints. Also shows railroads. In Russian. Pulkovo (St. Petersburg) meridian. Available also through the Library of Congress Web site as a raster image. Includes table of extreme high elevations. LC copy torn at edge, taped, inscribed in ink by the author in upper margin: The Congress Library, Washington D.C., from J. de Schokalsky in remembrance of 2 visits--1912.
Shokalʹskiĭ, I︠u︡. M. (I︠u︡liĭ Mikhaĭlovich) - Russia. Pereselencheskoe Upravlenīe. - Shokalʹskiĭ, I︠u︡. M.