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Titles
- A syllabus of the lectures on hygiene, vital statistics, etc. by Prof. Jno. S. Billings and Dr. A.C. Abbott at the University of Pennsylvania, 1891-921
- An account of the influenza as it appeared in Philadelphia in the winters of 1889-'90 and 1891-'921
- Die Influenza-Epidemie 1889/901
- Old family letters1
- Old family letters (Series A)1
- Old family letters (Series B)1
- Pneumonia in Boston during the recent epidemic of influenza1
- Report of an epidemic of typhoid fever in North Carolina, and its investigation1