Bosscher, D.F.J. 1996. “W.H. Salzmann, Bedrijfsleven, Overheid En Handelsbevordering. The Netherlands Chamber of Commerce in the United States, Inc. 1903-1987”. BMGN - Low Countries Historical Review 111 (3):422-24. https://doi.org/10.18352/bmgn-lchr.4322.