Thesen zur sozialen Politik; die Grundgedanken des Rundschreibens Quadragesimo anno. - Pieper, Josef, 1904-1997. (Frankfurt am Main, J. Knecht, 1947)
First pub. in 1933 under title: Thesen zur Gesellschaftspolitik.
Keywords: Catholic Church. -- Pope (1922-1939 : Pius XI).; Church and labor; Church and social problems -- Catholic Church