1. The pig iron arrangement even fixed prices and was renewed in 1929 without undue problems. Economic and Trade Conditions in Belgium 1929, report prepared by N.S. Reyntiens for the Department of Overseas Trade.
2. Report on the Meeting of the A-Product Cartel, Jan. 31, 1929 (Gutehoffnungshütte Historisches Archly, 40000010/4b).
3. Report on the Economic Situation of Belgium 1926, p. 61.