... Senate Exec... 
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...19; Senate Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...61; Senate Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...22, 1850: Senate Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...Report of the Secretary of the Navy,1859; Senate Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...29, 1851: House Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...House Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
..."House Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
..." Senate Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...83; House Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...41–5;House Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...46–52; House Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...Senate Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...; Senate Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...Senate Exec Doc...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...See also House Exec...
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
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