Keywords: Portland-Monson Slate Company
Item 78790
Panoramic view of Portland-Monson Slate Co., Monson, ca. 1900
Contributed by: Monson Historical Society Date: circa 1900 Location: Monson Media: Photographic print
Item 78785
Portland-Monson Slate Company, Monson, ca. 1890
Contributed by: Monson Historical Society Date: circa 1890 Location: Monson Media: Photographic print
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Mantor Library, University of Maine Farmington
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