* Across the river Carnegie Library of Pittsburgh historical reprint* June 11th, 2006 article in the Pittsburgh Tribune-Review on the centennial of the annexation of Allegheny City into Pittsburgh* German Heritage Sites in Pittsburgh and Allegheny City* The Teutonia Männerchor* Underground Railroad in Pennsylvania
* Across the river Carnegie Library of Pittsburgh historical reprint* June 11th, 2006 article in the Pittsburgh Tribune-Review on the centennial of the annexation of Allegheny City into Pittsburgh* German Heritage Sites in Pittsburgh and Allegheny City