Genre
Census data
Statistics
237
Census, 2000
52
Handbooks and manuals
52
Census, 1990
35
Census
22
Census, 1980
22
Census, 2010
19
Reference works
13
Conference papers and proceedings
10
Databases
9
Legislative hearings
9
Maps
7
Catalogs
5
Indexes
4
Vital statistics
4
Bibliographies
3
Census, 1960
3
Census, 1970
3
Classification
2
Congresses
2
Family histories
2
Legislative materials
2
Blank forms
1
Census, 1930
1
Dictionaries
1
Examinations
1
Forms
1
Guidebooks
1
Illustrated works
1
Interviews
1
Questionnaires
1
Registers (Lists)
1
Software
1