Genre
Sources
22
Newspapers
21
Periodicals
21
Biography
16
Congresses
14
Abstracts
7
Archives
7
Indexes
6
Microform catalogs
4
Bibliography
2
Textbooks
2
Anecdotes
1
Correspondence
1
Dictionaries
1
Early works to 1800
1
History
1
Popular works
1
Records and correspondence
1
Russian émigré literary periodicals
1
Russian émigré political periodicals
1
Statistics
1