ZEUTHEN, F. A Survey of Contemporary Economics, Volume 11, ed. Bernhard F. Haley, published for the American Economic Association. Richard D. Irwin, 1952. 474 s. Nationaløkonomisk tidsskrift, [S. l.], v. 93, 1955. Disponível em: https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/60710. Acesso em: 23 may. 2024.