Thoughts on the original unity of the human race.

Eitemau Tebyg

• The doctrine of the unity of the human race examined on the principles of science
  gan: Bachman, John, 1790-1874
  Cyhoeddwyd: (1850)
• The testimony of modern science to the unity of mankind; being a summary of the conclusions announced by the highest authorities in the several departments of physiology, zoology, and comparative philology in favor of the specific unity and common origin of all the varieties of man
  gan: Cabell, J. L. (James Lawrence), 1813-1889
  Cyhoeddwyd: (1859)
• The testimony of modern science to the unity of mankind ; being a summary of the conclusions announced by the highest authorities in several departments of physiology, zoology, and comparative philology in favor of the specific unity and common origin the varieties of man
  gan: Cabell, James Lawerence, 1813-1889
  Cyhoeddwyd: (1859)
• An examination of Professor Agassiz's sketch of the natural provinces of the animal world and their relation to the different types of man
  gan: Bachman, John, 1790-1874
  Cyhoeddwyd: (1855)
• Indigenous races of the earth; or, New chapters of ethnological inquiry; including monographs on special departments contributed by Alfred Maury, Francis Pulszky, and J. Aitken Meigs. Presenting fresh investigations, documents, and materials
  gan: Nott, Josiah Clark, 1804-1873
  Cyhoeddwyd: (1857)