MapHarmony, Butler County, Pennsylvania 1901. Perspective map not drawn to scale. Bird's-eye view. LC Panoramic maps (2nd ed.), 787 Available also through the Library of Congress Web site as a raster image. Indexed for points of interest. AACR2
- Contributor: Fowler, T. M. (Thaddeus Mortimer) - Moyer, James - Fowler, T. M.
- Date: 1901