Genre
Electronic books
21
Sources
9
Records and correspondence
7
Handbooks, manuals, etc
5
Regulations
3
Registers
2
Biographies
1
Biography
1
Catalogs
1
Classification
1
Digital images
1
Fulltext
1
Genealogy
1
Indexes
1
Internet Resource
1
Non-commissioned officers' handbooks
1
Officers' handbooks
1
Quotations, maxims, etc
1