. "Zimmerman, Philip; Harmony in Wood, Ambridge, PA: Friends of Old Economy Village, 2010. Members of the Harmony Society, a pietist, communal German religious group of separatist Lutherans, founded in 1814 by German immigrant George Rapp (actually Johann Georg Rapp) and then settled in Pennsylvania and Indiana."@en . . "Harmonist (Christian sect)"@en . . "2015-07-16"^^ . "2015-07-16"^^ .