Delaware County, Pennsylvania /

Relief shown by contours and spot heights.Alternate title at lower right: Delaware Co., Pa. : 39075-H4-CF-050 : 1991."Map edited 1991."In upper margin: United States, Department of the Interior, Geological Survey; Commonwealth of Pennsylvania, Department of Environmental Resources, Topographic and Geologic Survey.Pa. coordinate and UTM grids.Includes notes, "Index to 1:24,000-scale maps," and location map