Megens, C.M. “D. Hellema, C. Wiebes, T. Witte, Doelwit Rotterdam. Nederland En De Oliecrisis 1973-1974”. BMGN - Low Countries Historical Review 115, no. 4 (January 1, 2000): 662–663. Accessed April 19, 2024. https://bmgn-lchr.nl/article/view/URN%3ANBN%3ANL%3AUI%3A10-1-106178.