Beltran, Maria Helena Roxo, and Vera Cecilia Machline. “Images As Documents for the History of Science: Some Remarks Concerning Classification”. Circumscribere International Journal for the History of Science 20 (May 28, 2018): 112–119. Accessed December 5, 2025. https://revistas.pucsp.br/index.php/circumhc/article/view/35493.