نوع المادة
Periodicals
84,621
Statistics
80,802
Maps
64,605
Legislative materials
42,916
Legislative hearings
37,715
Handbooks, manuals, etc
29,608
Bibliography
20,696
Government publications
19,112
Congresses
17,194
Electronic books
16,004
Rules and practice
11,602
Technical reports
10,634
History
10,007
Conference papers and proceedings
8,762
Handbooks and manuals
8,248
Rules
7,836
Topographic maps
7,582
Directories
7,252
Catalogs
7,226
Bibliographies
4,831
Databases
4,558
Treaties
4,440
Census, 1990
2,937
Case studies
2,874
Biography
2,809
Classification
2,800
Tables
2,777
Abstracts
2,613
Statistiques
2,406
Observations
2,305
Census data
2,259
Census, 1980
2,248
Statutes and codes
2,129
Maps, Topographic
2,055
Indexes
1,983
Internet resource
1,842
Posters
1,769
Forms
1,735
Census, 20th, 1980
1,709
Periodical
1,655
Biographies
1,613
CD-ROMs
1,557
Remote-sensing maps
1,528
Electronic government information
1,526
Cartes géographiques
1,403
Census
1,395
Sources
1,373
Messages
1,366
Congress
1,362
Guidebooks
1,308
المزيد ...