Important indications for the identification of books from the Institut für Sozialforschung in the holdings of the Staatsbibliothek zu Berlin are the Institute's stamp and handwritten accession number as well as the accession number assigned by the Preußische Staatsbibliothek in 1937, consisting of the abbreviation "IfS" and a consecutive number noted on the back of the title page.

„N. Bervi-Flerovskij, Zapiski revoljucioneramečtatelja (= Records of a revolutionary hobbyist), Moskau: Molodaja Gvardija, 1929 ,” Spotlight on the Objects, zuletzt aufgerufen am 19. April 2024, https://ausstellungen.deutsche-digitale-bibliothek.de/spotlight-objects-spk/items/show/55.