Genre
Electronic books
22
Periodicals
14
Sources
10
Records and correspondence
7
Handbooks, manuals, etc
6
Regulations
4
Registers
2
Academic theses
1
Biographies
1
Biography
1
By-laws
1
Cases
1
Catalogs
1
Classification
1
Collections
1
Digital images
1
Fulltext
1
Genealogy
1
Indexes
1
Internet Resource
1
Libros de referencias, manuales, etc
1
Non-commissioned officers' handbooks
1
Officers' handbooks
1
Patents
1
Quotations, maxims, etc
1
Soldiers' handbooks
1