Informazioni sulla fonte
Ancestry.com. History of the Underground Railroad as it was conducted by the Anti-Slavery League [database online]. Provo, UT: Ancestry.com Operations Inc, 2005.Dati originali: Cockrum, William Monroe,. History of the Underground Railroad as it was conducted by the Anti-Slavery League : including many thrilling encounters between those aiding the slaves to escape and those trying to recapture them. Oakland City, Ind.: J.W. Cockrum Print. Co., c1915.
