Authors: van Willigen, J.D. --- Duterloo, H.S. --- 'sGravenmade, E.J. --- de Jongh, H.J. --- Liem, S.B. --- et al. Lingeman, C. --- Nieuwenhuijs, J.H.M. --- Spoelstra, A.J.G. --- Weijs, W.A.
Year: 1983 Publisher: Utrecht Bohn, Scheltema en Holkema