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Publisher
- National Board for Promotion of Rifle Practice37
- National Guard Bureau75
- National Youth Administration3
- Nautical Almanac Office3
- Naval Academy1
- Naval Intelligence Office1
- Naval Observatory3
- Naval War Records Office1
- Navigation Bureau6
- New York Arsenal1
- New York Harbor Supervisor20
- Niagara Falls Committee1
- Northern and Northwestern Lake Survey1,210
- Northern and Northwestern Lakes Survey2
- Northern and Northwestern Lakes Survey Charts8
- Northern and Southwestern Lakes Survey7