found: Author's Naar en ... 1975.
found: Forcasting the labour market by occupation ... c1994:CIP t.p. (Hans Heijke) galley (Prof. J.A.M. Heijke; dir., Research Centre for Education and the Labour Market (ROA) and Prof. of Education and the Labour Market, Dept. of Economics and Business Admin., Univ. of Limberg; 1970 finished studies in economics at Univ. of Amsterdam; doctorate, 1979, Erasmus Univ., Rotterdam)
found: Education and training in a knowledge based economy, 2000:CIP t.p. (Hans Heijke, Research Centre for Education and the Labour Market, Maastricht Univ.) data sheet (b. Feb. 25, 1943)
found: Information from 678 converted Dec. 8, 2014(Drs.)