 | Sistemas - A primeira revista Brasileira de Microcomputadores (in Portuguese). ATI. 1985 [1985-09]. p. 14. Retrieved 2022-12-30. "Sistema operacional"... 10 KB (471 words) - 12:35, 25 January 2023 |
 | Archived from the original on 23 June 2021. Retrieved 23 June 2021. Guía operacional matemática 9 [Ninth Grade Mathematics Operational Guide] (PDF) (in Spanish)... 87 KB (7,966 words) - 23:13, 25 April 2024 |