RussGus: 5 hits for Sapir, B.

The Bibliographic Database of German Publication on Russia, the Soviet Union and its Successor States (RussGus) contains about 170.000 records from 1974 to 2003 and collects publications of different document types: books, dissertations and other university publications, articles from journals and newspapers including reviews, maps etc. The lists of personal and geographical subjects are located here and here.

Your search for Sapir, B. provides 5 hits
1	Iz archiva L(idii) O(sipovny) Dan. Otdobral, snadbil primečanjami i očerkom biografii L.O. Dan Boris Sapir / From the archives of L.O. Dan. Selected, annotated and with an outline of L.O. Dan's biography by Boris Sapir. (Russian Series on Social History, 4) Fieseler, Beate, in: Jahrbücher für Geschichte Osteuropas, 36, 1988, S. 594-595 (Rezension)
2	Theodore Dan: Letters (1899-1946). Selected, Annotated and with an Outline of Dan's Political Biography by Boris Sapir (Russian Series on Social History, Vol. 3.) Fischer, Alexander, in: Historische Zeitschrift, 251, 1990, S. 180-181 (Rezension)
3	From the Archives of L.O. Dan. Selected, annoted and with an outline of L.O. Dan's biography by Boris Sapir (In russischer Sprache). Geyer, Dietrich, in: Osteuropa, 40, 1990, S. 788 (Rezension)
4	Lavrov. Gody ėmigracii. Archivnye materialy v dvuch tomach. Otobval, snabdil primečanijami i vstupitel'nym očerkom Boris Šapir Bd. 1.: Lavrov i Lopatin (Perepiska 1870-1883) LX, 603 S.; Bd. 2: Ot "Vpered!" k Gruppe Starych Narodovol'cev. XVI, 669 S. (Russian Series on Social History, 2, 1-2) Peter Scheibert, in: Jahrbücher für Geschichte Osteuropas, 1976, N.F. 24, S. 264-265 (Rezension)
5	Theodore Dan: Letters (1899-1946). Selected, annotated and with an outline of Dan's political biography by Boris Sapir. (In russ. Spr.) (Russian Series on Social History, 3) Geyer, Dietrich, in: Osteuropa, 38, 1988, 4, S. 320-321 (Rezension)

The Bibliographic Database of German Publication on Russia, the Soviet Union and its Successor States (RussGus)

Iz archiva L(idii) O(sipovny) Dan. Otdobral, snadbil primečanjami i očerkom biografii L.O. Dan Boris Sapir / From the archives of L.O. Dan. Selected, annotated and with an outline of L.O. Dan's biography by Boris Sapir. (Russian Series on Social History, 4)

Theodore Dan: Letters (1899-1946). Selected, Annotated and with an Outline of Dan's Political Biography by Boris Sapir (Russian Series on Social History, Vol. 3.)

From the Archives of L.O. Dan. Selected, annoted and with an outline of L.O. Dan's biography by Boris Sapir (In russischer Sprache).

Lavrov. Gody ėmigracii. Archivnye materialy v dvuch tomach. Otobval, snabdil primečanijami i vstupitel'nym očerkom Boris Šapir Bd. 1.: Lavrov i Lopatin (Perepiska 1870-1883) LX, 603 S.; Bd. 2: Ot "Vpered!" k Gruppe Starych Narodovol'cev. XVI, 669 S. (Russian Series on Social History, 2, 1-2)

Theodore Dan: Letters (1899-1946). Selected, annotated and with an outline of Dan's political biography by Boris Sapir. (In russ. Spr.) (Russian Series on Social History, 3)