1. The Pennsylvania Workmen's Compensation Act, effective July 1, 1945: act of June 21, 1939, Pamphlet Law 520 as amended Author(s): Pennsylvania, enacting jurisdiction. Publication: Harrisburg : Commonwealth of Pennsylvania, Department of Labor and Industry, 1945 Subject(s): Workers' Compensation -- legislation & jurisprudenceOccupational Health -- legislation & jurisprudenceOccupational DiseasesPennsylvania