Coolidge, Austin J.; John B. Mansfield (1859). A History and Description of New England. Boston, Massachusetts: A.J. Coolidge. pp. 331–332. A History and Description of New England Coolidge Mansfield.
"Union Elementary School." Regional School Unit 40. Retrieved on November 6, 2018. "Downstairs in our building, [...] RSU 40/MSAD 40 Administrative Offices and Rivers Alternative Middle School are both located upstairs."