George Combe Quotes
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George Combe (2010). “Notes on the United States of North America During a Phrenological Visit in 1838-39-40”, p.84, Cambridge University Press
George Combe (1841). “Notes on the United States of North America: During a Phrenological Visit in 1838-9-40”, p.85
George Combe (1830). “A System of Phrenology”, p.106