Derby, George
A Dictionary of American Authors · 1904 · p. 59
Ms., 1819-1874. Cousin of E. H. Derby, supra. A physician of Boston, prominent as a sanitarian, who published Anthracite and Health.
Bu kavram başka kaynaklarda da geçiyor
The American Dictionary and Cyclopedia (1909)
Chandler's Encyclopedia (1898)
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