01584oem 2200505 450 991070820640332120210309152439.0(CKB)4950000000090413(OCoLC)1110704563(EXLCZ)99495000000009041320190731d2017 ua engb|||||||||||||||||||||dur|||||||||||txtrdacontentcrdamediacrrdacarrierNational Underground Railroad Network to Freedom /National Park Service, U.S. Department of the Interior[Washington, D.C.] :National Park Service, U.S. Department of the Interior,[2017]1 online resource (1 map) colorNATIONAL UNDERGROUND RAILROAD NETWORK TO FREEDOM ACT OF 1997 Underground RailroadMapsFugitive slavesUnited StatesHistoryMapsFugitive slavesfastUnderground RailroadfastUnited StatesfastHistory.fastMaps.fastMaps.lcgftUnderground RailroadFugitive slavesHistoryFugitive slaves.Underground Railroad.United States.National Park Service,GPOGPOGPOOCLCFGPOBOOK9910708206403321National Underground Railroad Network to Freedom3312581UNINA