RUITENBEEK, Kees. Elektrische apparaten van de ‘Nederlandsche Optiek- en Instrumentenfabriek Dr. C.E. Bleeker’. Studium, Amsterdam, v. 7, n. 4, p. 240–250, 2015. DOI: 10.18352/studium.9914. Disponível em: https://platform.openjournals.nl/studium/article/view/20364.. Acesso em: 23 dec. 2024.