http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geologic map of the Fort Wilkins quadrangle, Michigan
Bedrock geology of the Fort Wilkins quadrangle, Michigan
1 map : color ; 58 x 40 cm., on sheet 76 x 127 cm., folded in envelope 30 x 24 cm.