HELTBERG, Leif. Tibor Barna (Editor): The Structural Interdependence the Economy. New York and Milano 1956. Pris 7,50 $. VIII + 429 sider. Nationaløkonomisk Tidsskrift, [S. l.], v. 95, 1957. Disponível em: https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/60793. Acesso em: 6 dec. 2025.