Portage programma : portage programma Nederland - revised portage groepsprogramma : theoretische en praktische handleiding / A.T. Hoekstra, C.E. Oenema-Mostert, B.F. van der Meulen ; m.m.v. M.J. van Marle-DekkerImproving the basis: revision of an early childhood home intervention program : the Dutch version of the Portage Program - revised / Aafke Tryntsje HoekstraImproving the basis: revision of an early childhood home intervention program : the Dutch version of the Portage Program - revised / Aafke Tryntsje Hoekstra