What is the influence of vocabulary size and the use of writing techniques in the proficiency of students in the level of academic writing that students reach in the English Composition II course, semester I 2015 at the Foreign Language Department of the Arts and Sciences School of the University of El Salvador - Cáceres Salinas, María José (Tesis para optar al titulo de – (Licenciatura en Idioma Inglés Opción Enseñanza) – Universidad de El Salvador, San Salvador, 2016)
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