01448oam 2200445 450 991070365090332120171229160030.0(CKB)5470000002433202(OCoLC)905650865(EXLCZ)99547000000243320220150326d2015 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierHarriet Tubman Underground Railroad National Monument, Maryland /National Park Service, U.S. Department of the Interior[Washington, DC] :National Park Service,[2015]1 online resource (2 unnumbered pages) illustrations, maps (some color)Underground RailroadMarylandSlaveryUnited StatesHistory19th centurySlaveryfastUnderground RailroadfastHarriet Tubman Underground Railroad National Historical Park (Md.)MarylandfastUnited StatesfastHistory.fastUnderground RailroadSlaveryHistorySlavery.Underground Railroad.GPOGPOCOOOCLCFGPOBOOK9910703650903321Harriet Tubman Underground Railroad National Monument, Maryland3160398UNINA