- 'Urban planning in the United States I'. In: Algemeen Handelsblad Monday, August 29, 1927, p. 5.
- 'Urban planning in the United States II'. In: Algemeen Handelsblad Sunday, September 4, 1927.
- 'Urban planning in the United States III'. In: Algemeen Handelsblad Tuesday, September 13, 1927.
- 'Urban planning in the United States IV'. In: Algemeen Handelsblad Saturday, September 7, 1927.