http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Bureau of Topographic and Geologic Survey.
2 maps : color ; 158 x 103 cm., sheets 102 x 112 cm. and 95 x 121 cm.
produced by the United States Geological Survey ; commonwealth of Pennsylvania, Department of Environmental Resources, Topographic and Geologic Survey.
Relief shown by contours and spot heights.
Title at right foot of map: Huntingdon Co., Pa.
Includes notes, "Index to 1:24 000-scale maps," and location map.