Publicatie
Hofman, W.H.A., A.F.M. Nieuwenhuis & P.H. Oirbans, (1989): Technology, qualification structure and the effect of scholing. , Rotterdam: RISBO/EUR
Hofman, W.H.A., A.F.M. Nieuwenhuis & P.H. Oirbans, (1989): Technology, qualification structure and the effect of scholing. , Rotterdam: RISBO/EUR