Scale not given (W 77°34ʹ38ʺ--W 77°32ʹ48ʺ/N 40°38ʹ51ʺ--N 40°37ʹ17ʺ).
Note
Title supplied by cataloger. Base map hand-annotated in red and blue ink to show changes to enumeration district boundaries and numbers. Attributed to 1970 census data. "1970 E.D.'s 40 to 43." "Burnham, PA, 70-10041."