found: Die Makellosigkeit der Kirche in den lateinischen Hoheliedkommentaren des Mittelalters, 1958:title page (von Helmut Riedlinger)
found: Kann man Gott aus der Natur erkennen?, 1990:title page (Helmut Riedlinger) page 175 (Universität Freiburg im Breisgau)
found: LC data base, July 23, 1992(hdg.: Riedlinger, Helmut)
found: German Wikipedia, viewed December 20, 2017(Helmut Riedlinger; born February 17, 1923, in Bohlingen am Bodensee (now part of Singen); died May 14, 2007, in Freiburg im Breisgau; German Catholic theologian; ordained to the Catholic priesthood in 1951; obtained his doctorate at Freiburg im Breisgau in 1956)
found: Deutsche Nationalbibliothek online catalog, viewed February 17, 2022(authorized access point: Riedlinger, Helmut; other data in authority record: Prof. Dr.; German Catholic theologian and priest; born 1923 in Bohlingen; died 2007 in Freiburg im Breisgau; taught at the Universität Freiburg im Breisgau)