PORSHNEVA, Olga. Ф. Харпер—свидетель Русской революции 1917 г. Journal of Russian American Studies, [S. l.], v. 2, n. 2, 2018. DOI: 10.17161/jras.v2i2.8232. Disponível em: https://journals.ku.edu/jras/article/view/8232.. Acesso em: 3 may. 2024.