Olsen, E. (1964) “Theodore W. Schultz: The Economic Value of Education. Columbia University Press, New York and London 1963, XII + 92 sider, $2.75”., Nationaløkonomisk tidsskrift, 102. Available at: https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/61162 (Accessed: 5 December 2025).