Archief van H.J.W. Becht en J.H. de Bussy, UBA223. Allard Pierson.
Archief van H.J.W. Becht en J.H. de Bussy, UBA223. Allard Pierson. https://archives.uba.uva.nl/repositories/2/resources/157 Accessed October 04, 2023.
