Genre
Sources
227
History
218
Records and correspondence
201
Archives
142
Early works to 1800
134
Military history
82
Early works
80
Maps
47
Electronic books
11
Charters
6
Charters and articles of incorporation
5
Personal correspondence
5
Records (Documents)
5
Naval history
4
Architectural drawings
3
Correspondence
3
Designs and plans
3
Periodicals
3
Pictorial works
3
To 1789
3
Biography
2
Electronic reference sources
2
Indexes
2
Pictures
2
Registers
2
Annual reports
1
Antislavery literature
1
Bases de données
1
Biographies
1
Colonial reports
1
Databases
1
Full-text databases
1
Gazetteers
1
Illustrated works
1
Laws
1
Online databases
1
Registers (Lists)
1
Souces
1
Sources (form)
1
Statistics
1
Trials, litigation, etc
1
databases
1