VAN DER HOEK, Gerard J. Educatieve spulledozen . The Rijksmuseum Bulletin, [S. l.], v. 23, n. 2, p. 90–91, 1975. DOI: 10.52476/trb.20988. Disponível em: https://bulletin.rijksmuseum.nl/article/view/20988.. Acesso em: 17 dec. 2024.