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Authors
- Nelson, R. W.1
- New Jersey. State Board of Health, author.2
- Newton (Mass.). Board of Health.1
- Newton, William K., author1
- Noble, George H., author1
- North Carolina. State Board of Health, author.1
- Norton, Geo. S. (George Salmon), 1851-1891, author1
- Norton, Sidney A. (Sidney Augustus), 1835-1918, author1
- Noyes, Isaac P., author1