Documentation: article from De Groene Amsterdammer 1955-11-26 'Amsterdam gets a city architect', article from NRC 1961-10-20 'In memoriam B. Merkelbach', article from Het Parool 1961-11-18 'Merkelbach: socially oriented architect', article 'Amsterdam city architect Merkelbach died', magazine Bouwkundig Weekblad 1964/7 with article on installation Merkelbach as honorary member BNA