Genre
History
2,818
Periodicals
2,433
Electronic books
2,351
Statistics
1,970
Congresses
880
Legislative hearings
798
Internet videos
639
Conference papers and proceedings
624
Radio news programs
428
Bibliography
411
Documentary films
368
Educational films
342
Video recordings
317
Interviews
307
Biography
294
Case studies
244
Television news programs
227
Sources
223
Speeches
218
Databases
206
Nonfiction films
202
Biographies
196
Government publications
195
Printed ephemera
194
Academic theses
190
Bibliographies
184
Documentary television programs
180
Dictionaries
178
Broadsides
175
Feature films
167
Maps
158
Correspondence
153
Early works to 1800
148
Messages
139
Video recordings for the hearing impaired
110
Handbooks, manuals, etc
105
Early works
94
Legislative materials
93
Speeches in Congress
91
Périodiques
89
Statistiques
84
DVD-Video discs
76
Electronic journals
76
Pamphlets
74
Pictorial works
74
Oral histories (literary works)
71
Périodiques
70
Census data
66
Handbooks and manuals
66
Directories
65
more ...