1. Thoughts on the original unity of the human race Author(s): Caldwell, Charles, 1772-1853 Publication: New-York, E. Bliss, 1830 Subject(s): Continental Population GroupsBiological EvolutionReligion and Science
2. Thoughts on the original unity of the human race Author(s): Caldwell, Charles, 1772-1853 Publication: Cincinnati : J.A. & U.P. James, 1852 Subject(s): Continental Population GroupsBiological EvolutionReligion and Science
