found: Kardinal Johannes Gropper, 1503-1559, und die Anfänge der katholischen Reform in Deutschland, 1951:title page (Walter Lipgens)
found: Documents on the history of European integration. Volume 2, 1986:title page (Walter Lipgens) data sheet (died April 29, 1984)
found: German Wikipedia, viewed June 25, 2020(Walter Lipgens; born June 12, 1925, in Düsseldorf; died April 29, 1984, in Saarbrücken; German historian; obtained his doctorate in 1948 at the Universität Tübingen; he was professor of modern history at the Universität des Saarlandes in Saarbrücken from 1967 until his death in 1984)
found: Deutsche Nationalbibliothek online catalog, viewed August 8, 2023(authorized access point: Lipgens, Walter; other data in authority record: German historian; born 1925 in Düsseldorf; died 1984)
