Schröter, Julie, Cyrille Foasso, Ludovic Bellot-Gurlet, and Laura Brambilla. “Investigating Five Totalizing Counters Manufactured by the Alphonse Darras Company of the CNAM Collections in Paris”. Conservar Património 44 (September 28, 2023): 90–102. Accessed January 26, 2026. https://conservarpatrimonio.pt/article/view/29230.