LC Subject Heading: Slate--Maine--Monson
Item 78797
Slate Mill operation, Monson, ca. 1920
Contributed by: Monson Historical Society Date: circa 1920 Location: Monson Media: Photographic print
Item 78796
Portland-Monson Slate Company, Monson, ca. 1915
Contributed by: Monson Historical Society Date: circa 1915 Location: Monson Media: Photographic print
