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The Butterfield Overland Mail 1857-1869;its organization and operation over the southern route to 1861; subsequently over the central route to 1866; and under Wells Fargo and Company in 1869Bookद्वारा Conkling, Roscoe P. (Roscoe Platt), 1877-1971-
प्रकाशित 1947पुस्तक
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Postmarked Washingtonan encyclopedia of postal history covering eleven counties of eastern Washington based on the research of the late Guy Reed Ramsey and other sourcesBookद्वारा Webber, Bert
प्रकाशित 1987पुस्तक
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