Pérez González, C. P., Orellana Villeda, I. M., Figueroa Urbano, V. E., Ortiz Rivera, A. B. G., Hernández Rivas, R. A., & Garay Salinas, R. Main factors that determine students´ level of proficiency in English Intermediate I of the Foreign Languages Department of the University of El Salvador during the semester II-2011.

Pérez González, Claudia Patricia,, Ingrid Mariela Orellana Villeda, Vicky Evangelina Figueroa Urbano, Ana Blanca Guadalupe Ortiz Rivera, René Arturo Hernández Rivas, and Ricardo Garay Salinas. Main Factors That Determine Students´ Level of Proficiency in English Intermediate I of the Foreign Languages Department of the University of El Salvador During the Semester II-2011.

Pérez González, Claudia Patricia,, et al. Main Factors That Determine Students´ Level of Proficiency in English Intermediate I of the Foreign Languages Department of the University of El Salvador During the Semester II-2011.