Francis, J. G. 1., Harnish, A. J., & Weiser, F. S. 1. (1955). The Harnish Friendschaft (the Harnish family): A collection of historical materials relating to descendants of Martin Harnish of Conestoga Township, Lancaster County, Pennsylvania, 1729-1926. Gettysburg, Pa.: Privately published.

Francis, J. G. 1870-1958., Alice Jacoby Harnish, and Frederick S. 1935-2009 Weiser. The Harnish Friendschaft (the Harnish Family): A Collection of Historical Materials Relating to Descendants of Martin Harnish of Conestoga Township, Lancaster County, Pennsylvania, 1729-1926. Gettysburg, Pa.: Privately published, 1955.

Francis, J. G. 1870-1958., Alice Jacoby Harnish, and Frederick S. 1935-2009 Weiser. The Harnish Friendschaft (the Harnish Family): A Collection of Historical Materials Relating to Descendants of Martin Harnish of Conestoga Township, Lancaster County, Pennsylvania, 1729-1926. Gettysburg, Pa.: Privately published, 1955.