The Jacob Zimmerman, Sr. family of Hartley Township, Union County, PennsylvaniaJudith S. Wagner · First published 2001Open the Tome
The Jacob Yarger family of Union County, PennsylvaniaJudith S. Wagner · First published 1994Open the Tome
Jesse and Mary Zimmerman and descendants of Union County, PennsylvaniaJudith S. Wagner · First published 1991Open the Tome
