00521nam a22001817a 4500001001000000003000400010005001700014008003400031035002000065040001300085074000800098245001800106260007200124300002000196500001700216650003100233856007500264000362755OSt20170215094853.0920114s1991  vaub    f000 0 eng 0  a(OCoLC)25105978  aGPOcGPO  a621  aTypes of Maps  aReston, VAbU.S Dept. of the Interior, U.S. Geological Surveyc1991  a8.pbmapsc23cm  aCover Tittle  0CartographyzUnited States  uhttp://catalog.gpo.gov/fdlpdir/locate.jsp?ItemNumber=621&SYS=000362755