1. Gettysburg National Military Park : the location of the monuments, markers and tablets on the battlefield of Gettysburg Collection: Samuel J. May Anti-Slavery Pamphlet Collection Publisher: United States Government Printing Office Publication Place: Washington Date: 1932 Format: Book
2. Economic aspects of slavery in relation to southern and southwestern migration Collection: Samuel J. May Anti-Slavery Pamphlet Collection Publisher: George Peabody College for Teachers Publication Place: Nashville, Tenn. Date: 1932 Format: Book
