found: Lynch, D. Riverdale Park, c2011:back cover (Riverdale Park, Md.; small town located along Anacostia Trails Heritage Area)
found: USGS GNIS, Apr. 28, 2012(Riverdale Park; pop. pl.; history: established 1889; incorporated as Riverdale ca. 1920; name changed to Riverdale Park ca. 1998; in Prince George's County, Md.); Oct. 31, 2019 (variant name: Riverdale; 38.9634440, -76.9316408; 385748N, 0765554W) (Town of Riverdale Park; civil)
found: Riverdale Park, MD website, Oct. 31, 2019:Our Town (seal: Town of Riverdale Park; formerly known and often referred to as Riverdale; officially renamed Riverdale Park in 1998)
found: Prince George's County website, Oct. 31, 2019:Government, General, Maps, Neighborhood Search Map (Riverdale Park; address: Riverdale, MD)
