Vieira de Aguiar, J. and Chaves Vasconcelos, M.C. 2017. The epistolary writing as an object of research: a stuy about the Brazilian princesses’ letters. Indagatio Didactica. 9, 3 (Mar. 2017), 113-127. DOI:https://doi.org/10.34624/id.v9i3.628.