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- N. J. Pittman Account Book, 1855/18812
- N. L. Michael Letters,, 1967/19683
- N. S. Andrews Letter, 18642
- N.R.A. Roller Hockey Club (Allentown, Pa.) Minutes, 19343
- NASA "Tape #3 EVA Suit/Glove Development" video conference, 19861
- NASA Collection, 1988/1994, bulk 199315
- NASA Project Tapes, 1963/196617
- Nack, Kenneth. Artist file: miscellaneous uncatalogued material1
- Nadar, Félix, 1820-1910. Artist file: miscellaneous uncatalogued material1
- Nadelman, Elie, 1882-1946. Artist file: miscellaneous uncatalogued material1
- Nadia Stamatova papers
19991