Authors: Osinga, A

Citation: A. Osinga, Rethinking at the elementary school, TIJD DIERG, 126(12), 2001, pp. 443-443

Authors: Reinders, J Osinga, A Talsma, D

Citation: J. Reinders et al., Jan Siert Reinders - In Memoriam, TIJD DIERG, 124(20), 1999, pp. 618-618