This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
CoalBarons. The Washington Schoolmaster An editorial cartoon about the Coal strike of strike by the United Mine Workers of America in the anthracite coal fields of eastern Pennsylvania In the cartoon sign on the wall states Primary Classroom for Coal Barons and world map shows disproportionately large state of Pennsylvania President