Redaktionen -. Erhardtsen, Aage: Evolution of concentration and competition in the Danish newspaper and magazine sector. Evolution of Concentration Competition Series, 10. Bruxelles: of the European Communities, 185 pp. Kr. 31,60. nt [Internet]. 1. januar 1979 [henvist 18. maj 2024];117. Tilgængelig hos: https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/63190