"SOCIAL ECONOMY PLANNING". The West Australian. Vol. XLVII, no. 9, 016. Western Australia. 19 May 1931. p. 5. Retrieved 24 April 2017 – via National Library of Australia., ...At...conferences on 'The Workshop in a Changing Economic Environment,' to be presided over by Prof. Dr. Goetz Briefs. Leiter des Instituts fur Betriebssozioiogie und Soziaie Betriebsiehre an der Technischen Hochscule zu Berlin,..
