Hits 1-3 within 3 documents
Hits 1-3 within 3 documents
Author(s): Leeuw, Edith de; Hox, Joop; Snijkers, Ger; Heer, Wim de.- 1998. 239-248p.
Author(s): Hox, Joop; Leeuw, Edith de; Snijkers, Ger.- 1998. 173-185p.
Author(s): Snijkers, Ger.- 2004. 190-203p.