Gomes MLM. Object lessons: notes on geometry in Norman Allison Calkins’ textbook (Brazil, end of nineteenth century, beginning of twentieth century). Rev. bras. hist. educ. [Internet]. 2011Dec.23 [cited 2026Apr.24];11(2 [26]):53-0. Available from: https://periodicos.uem.br/ojs/index.php/rbhe/article/view/38497