Columbia subject headings:
Harvard subject headings:
Europe, Eastern--Archival resources--Europe--Directories.
Europe, Eastern--Library resources--Europe--Directories.
Library resources--Europe--Directories.
Soviet Union--Archival resources--Europe--Directories.
Soviet Union--Library resources--Europe--Directories.
Princeton subject headings:
Archival resources--Europe.
Europe, Eastern--Archival resources--Europe--Directories.
Europe, Eastern--Library resources--Europe--Directories.
Library resources--Europe--Directories.
Library resources--Europe.
Soviet Union--Archival resources--Europe--Directories.
Soviet Union--Library resources--Europe--Directories.