found: His Sinn und Bedeutung in der Logik Gottlob Freges, 1965.
found: Zugänge zur Philosophie, c1979:t.p. (Christian Thiel) p. 133 (b. 1937)
found: Fregeana, 2022:title page (Christian Thiel)
found: AIPS website, June 13, 2023(Christian Thiel. Born 1937 in Neusalz/Oder. Dr. phil. at Erlangen in 1965; chair of philosophy and theory of science at the RWTH Aachen; acting director of the Erlangen Interdisciplinary Institute for Philosophy and History of Science; ret. as professor emeritus in 2005) - https://www.aips.be/en/christian-thiel
