Genre
Sources
5,902
Periodicals
678
Statistics
244
Congresses
236
Biography
128
Textbooks
100
Case studies
69
Early works to 1800
49
Bibliography
37
Handbooks, manuals, etc
25
Fiction
20
Newspapers
19
Correspondence
16
Electronic books
16
Pamphlets
16
Abstracts
12
Anecdotes
9
Directories
8
Catalogs
7
Literary collections
7
Portraits
7
Popular works
6
Statistics, Vital
6
Archives
5
Dictionaries
5
Miscellanea
5
Périodiques
5
Academic theses
4
Census, 1850
4
Census, 7th, 1850
4
Drama
4
Indexes
4
Personal narratives, German
4
Bio-bibliography
3
Calendars
3
Exhibitions
3
Interviews
3
Juvenile fiction
3
Juvenile literature
3
Longitudinal studies
3
Maps
3
Problems, exercises, etc
3
Yearbooks
3
Academic Dissertation
2
Biographies
2
Caricatures and cartoons
2
Case Reports
2
Census, 1860
2
Census, 8th, 1860
2
Early works to 1870
2
more ...