Matches in DBpedia 2016-04 for { ?s ?p <https://books.google.com/books?id=xLKGinEZxygC&lpg=PP1&dq=Front%20Line%20of%20Freedom%3A%20African%20Americans%20and%20the%20Forging%20of%20the%20Underground%20Railroad%20in%20the%20Ohio%20Valley&pg=PP1#v=onepage&q&f=true> }
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