H. Coumou, Sociale pedagogiek in Nederland 1900-1950. BMGN-LCHR [Internet]. 2000 Jan. 1 [cited 2024 Jun. 30];115(1):170-1. Available from: https://ojstest.minions.amsterdam/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-105965