WOLFFRAM, D.J. J.-J. van den Berg, Deining. Koers en karakter van de ARP ter discussie, 1956-1970. BMGN - Low Countries Historical Review, [S. l.], v. 115, n. 3, p. 498–500, 2000. DOI: 10.18352/bmgn-lchr.5336. Disponível em: https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106119.. Acesso em: 21 dec. 2024.