1. The opening exercises of the Institute of Hygiene of the University of Pennsylvania: Philadelphia, February 22, 1892 Author(s): University of Pennsylvania. Laboratory of Hygiene, author. Publication: Philadelphia : [publisher not identified], 1892 Subject(s): LaboratoriesAnniversaries and Special EventsUniversitiesPhiladelphiaUniversity of Pennsylvania. Laboratory of Hygiene.
2. The objects, plans, and needs of the Laboratory of Hygiene: an address delivered at the opening of the Laboratory of Hygiene of the University of Pennsylvania, February 22, 1892 Author(s): Billings, John S. (John Shaw), 1838-1913 Publication: [Philadelphia?] : [publisher not identified], [1892?] Subject(s): Public HealthLaboratoriesUniversity of Pennsylvania. Laboratory of Hygiene.
