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… Gutenberg - Thousands of free, out of copyright books to download, in various formats: Novels (including Dickens), …
… Of Technology. http://citeseerx.ist.psu.edu/viewdoc/download;jsessionid=7109A2E23430F8192AE2A3A7FE …
… from http://www.saudecoletiva2012.com.br/userfiles/file/didatico03.pdf (accessed Oct 17, 2014). Zavala M. (2016) …