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Kenyon, Robert Lloyd The Gold Coins of England: Arranged and Described: Being a Sequel to Mr. Hawkins' Silver Coins of En
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Chapin, Robert Coit The Standard of Living Among Workingmen's Families in New York City
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McDowell, Robert Harbold 1894-1980 Coins From Seleucia on the Tigris
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Catalogue of the Collecton of Coins, Medals, Tokens and Currency of Robert Coulton Davis
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Chapin, Robert Coit