Observer Publishing Co.
A document on the history of the Piscataquis County Historical Society, list of books, pamphlets, manuscripts, records and unpublished papers held by the society, and a bibliography of resources on the history of the county compiled by John Francis Sprague.
Piscataquis County Historical Society, "Piscataquis County Historical Society: Its By-laws and Membership, etc., and a Bibliography of Piscataquis County" (1916). Maine History Documents. 678.
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