. . "United States" . . . . "Juvenile works" . "Juvenile works"@en . . . "Shows how archaeologists and historians sift through root cellars, study songs and quilts, and use the latest technology to reconstruct the Underground Railroad, offering a look at the escape routes used by American slaves." . . . . . . . "Local history" . . . . "Freedom roads : searching for the Underground Railroad" . "Local history"@en . "Freedom roads : searching for the Underground Railroad"@en . . . . "Sources" . . . . . . . . . "Sources"@en . . "History" . "History"@en . . .