Genre
Legislative hearings
2,003
Legislative materials
1,857
Periodicals
1,838
Statistics
1,629
Conference papers and proceedings
1,359
Maps
1,290
Technical reports
1,023
Handbooks and manuals
840
Congresses
767
Bibliographies
549
Treaties
312
Directories
272
Serial publications
195
Databases
182
Catalogs
162
Case studies
140
Resolutions (Law)
128
Resolutions (Laws)
128
Resolutions
115
Longitudinal studies
109
Census data
108
Abstracts
96
Biographies
80
Classification
78
Dictionaries
76
Rules and practice
76
Commercial treaties
72
Calendars
57
Data dictionaries
53
Government publications
53
Personal correspondence
50
Observations
49
Records (Documents)
49
Patents
40
Indexes
39
Records and correspondence
37
Census, 2000
34
Programmed instructional materials
33
Geographic information systems
31
Software
30
Tables (Data)
30
Registers (Lists)
29
Drawings
27
Sound recordings
26
Guidebooks
22
Messages
21
Cross-cultural studies
20
Literature
20
Topographic maps
20
Census, 2010
17
more ...