A large manila envelope with an original photograph of Tschebotarioff's childhood friend, Mitya Heering, taken at a play put on by. children at the Pavlovsk palace of the Grand Duke Constantine Constantinovich, ca. 1907.
Correspondence with the State Museum of Revolution (Moscow), 1967–68.
Correspondence and newspaper clippings on the Rodion Berezov deportation case, 1950–57. Included are letters to Senator H. Alexander Smith and Berezov himself.
Several cardboard file boxes with correspondence pertaining to the first official U.S.A.USSR soil engineering exchange, 1959.
Cardboard file box with reviews and letters on Tschebotarioff's book, Russia, My Native Land. A U.S. Engineer Reminisces and Looks at the Present (New York: McGraw-Hill, 1964).
Two binders with typewritten texts left out of Russia, My Native Land. These include "Cossackia and Other Fantasia in Washington"; "Past History and Present East-West Tensions"; and "Are Both Sides Captives of Their Own Propaganda?"
A cardboard file box with correspondence pertaining to Tschebotarioff's trips to the Soviet Union as a tourist (1968) and as a member of the Eighth International Conference on Soil Mechanics, 1973.
Data related to the background of Colonel Oleg Golenewsky and his role as a pretender to the Russian throne.
Cardboard file box of correspondence with Tschebotarioff's old Russian army friends and other related data.
Cardboard file box of correspondence with Soviet engineering friends.
Bound typescript, 215 pp., "Zapiski inzhenera," by V. E. Sproge (Zurich, 1963). The main interest of these notes are Sproge's impressions on large construction projects in the Soviet Union between 1920 and 1940, including a detailed description, pp. 103–40, of the 1926 "Dnieprostroy" negotiation with the American Colonel Hugh L. Cooper. Unpublished finding aid.