1. DMO
- Reference (shelfmark):
- DMO
- Title:
- 'D.M.O. Secret'
- Scope & Content:
- Reports, memoranda, and correspondence originally held in the office of the Director of Military Intelligence, subsequently Director of Military Operations.
- Collection Area:
- Map Collections
- Languages:
- English
- Date Range:
- 1871-1938
- Extent:
- 53 volumes, 45 booklets, 13 fascicles, including 126 maps, and 29 photographs.