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Authors
- N. D. Whitney & Co. author.1
- Nagle, John T. (John Thomas), 1842-1919, author1
- Nahl, Hugo Wilhelm Arthur, 1833-18891
- Nancrede, Charles B. (Charles Beylard), 1847-19214
- Nancrede, Charles B. (Charles Beylard), 1847-1921 author1
- Nancrede, Charles B. (Charles Beylard), 1847-1921, author4
- Napheys, George H. (George Henry), 1842-187611
- Narragansett Machine Company.1
- Narro, Manuel.1
- Nash Dr. (James Addison)1
- Nassau Water Company, author.1
- Nassy, David de Isaac Cohen, 1747-18061
- National Academy of Sciences (U.S.)1
- National Academy of Sciences (U.S.), author.2
- National Association of Chiropodists (U.S.), author.1
- National Association of Ice Cream Manufacturers (U.S.)1
- National Board of Health (U.S.), author.2
- National Child Labor Committee (U.S.) author, issuing body.2
- National Child Labor Committee (U.S.) author.1
- National College of Pharmacy (Washington, D.C.), author.1