1. An essay on the indigenous malarial diseases of Wyomimg Valley: read, by appointment, before the Luzerne County Medical Society by Dr. John B. Crawford at Wilkes-Barre, Pa., May 11, 1881 Author(s): Crawford, John B., M.D., author Publication: Wilkes-Barre, Pa. : [publisher not identified], 1881 Subject(s): Fever -- epidemiologyAir Pollutants -- adverse effectsCoal IndustryPennsylvania
2. Sanitation in mining towns Author(s): Free, Spencer M., author Publication: [Philadelphia?] : [publisher not identified], [1888?] Subject(s): SanitationCoal IndustrySocial ConditionsPennsylvania
