Constant’s personal library was documented in 2019-2020. The project was supported by Stichting Dioraphte, Gravin van Bylandt Stichting and Fundatie Van den Santheuvel, Sobbe.

Year Title Author(s) CID
Punt Frans Kuipers, Piet Jager, Hans Vlek 6238
La Dernière Semaine de la Commune - 6390