Harmony, 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
Fowler, T. M. (Thaddeus Mortimer) - Moyer, James - Fowler, T. M.
Butler County, Pennsylvania
Relief shown by contours and spot heights. Alternate title in right lower margin: Butler Co., Pa. : N4039.5-W7940.5/31.5 X 30 : 1986. "Map edited 1986." In upper margin center: Commonwealth of Pennsylvania, Department of Environmental Resources, Topographic and Geologic Survey. Pennsylvania coordinate and UTM grids. Includes notes, "Index to 1:24 000-scale maps," and location map. Available also through the Library of Congress Web site...
Geological Survey (U.S.) - Pennsylvania. Bureau of Topographic and Geologic Survey