Skjerbæk, Gunnar. “Emil Lederer: TECHNICAL PROGRESS AND UNEMPLOYMENT. International Labour Studies and Reports, Series C, Nr. 22. Geneva 1938. 267 Sider”. Nationaløkonomisk tidsskrift 3 (January 1, 1939). Accessed December 5, 2025. https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/60048.