- National Homoeopathic Hospital Association (Washington, D.C.) author.1
- National Institute of Pharmacy (U.S.), author.1
- National Prison Association of the United States, author.2
- National Quarantine and Sanitary Convention (1857 : Philadelphia, Pa.)1
- National Quarantine and Sanitary Convention.2
- National Quarantine and Sanitary Convention. Committee on External Hygiene.1
- National Quarantine and Sanitary Convention. Committee on the Internal Hygiene of Cities.1
- National Remedy Company.1
- National Surgical Institute.2
- Navarro y Cardona, Eduardo, author1
- Neave, Désiré Jean Joseph.1
- Nebinger, Andrew, 1819-18862
- Nebinger, Andrew, 1819-1886, author2
- Nederland Life Insurance Company. United States Branch, author.1
- Neff, Joseph S., author2
- Neftel, William B. (William Basil), 1830-19061
- Neftel, William B. (William Basil), 1830-1906 author1
- Neftel, William B. (William Basil), 1830-1906, author3
- Neidhard, C. (Charles), 1809-18954
- Neidhard, C. (Charles), 1809-1895, author2