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Titles
- National Library of Medicine: services4
- Native voices: native people's concepts of health and illness1
- Neurosurgery before neurosurgery: the formative years, 1517-18671
- Nitrogen 15 in biological research: a preliminary list of references to 1 August 19511
- Nobel prize winners in medicine and physiology1
- Nobel prize winners in medicine and physiology: a selected group of portraits from the portrait collections maintained in the Art Section, Reference Division1
- Nostalgia's modernity--Modernity's nostalgics1
- Notable contributions to medical research by Public Health Service scientists: a biobibliography to 19401
- Notes on the Army Surgeon General's Office in Washington 1818-19481
- Notes to accompany an exhibit on the early history of spectacles, July-August 19561