Columbia subject headings:
Bibliographers--Soviet Union--Biography--Congresses.
Historians--Soviet Union--Biography--Congresses.
Luppov, Sergeĭ Pavlovich--Congresses.
Harvard subject headings:
Bibliographers--Soviet Union--Biography--Congresses.
Historians--Soviet Union--Biography--Congresses.
Luppov, S. P. (Sergeĭ Pavlovich)--Congresses.
Princeton subject headings:
Bibliographers--Soviet Union--Biography--Congresses.
Historians--Soviet Union--Biography--Congresses.
Luppov, S. P. (Sergeĭ Pavlovich)--Congresses.