The papers consist of manuscripts, photographs, and printed materials. Among the manuscripts are his typescript memoirs entitled "Vstrechi na zhiznennom puti" (53 pp.), which discuss his youth, student days in the history faculty of Moscow University, his work in the Constitutional Democratic (Kadet) Party, and the 1917 Revolution; and manuscripts of articles, some concerning the emigre monarchist movement. There are four photographs of Efimovskiĭ. Printed materials include offprints of his articles.

Correspondence, manuscripts, documents, photographs, subject files, printed materials, and memorabilia of historian George Vernadsky (Georgii Vladimirovich Vernadskii; 1887-1973). Most of the collection consists of his personal and professional papers, circa 1918-1973. Sizable groups of materials also concern members of his family, especially his wife Nina (1884-1971); his father, scientist Vladimir I. Vernadskii (1863-1945); his mother Nataliia E. Vernadskaia (1860-1943); and his sister Nina V. Toll' (1898-circa 1976).