1. 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.
