Pijarnsarid, Sukontip, and Prommintra Kongkaew. 2017. “AN ANALYSIS OF THE CONTENT WORDS USED IN A SCHOOL TEXTBOOK, TEAM UP ENGLISH 3, USED FOR GRADE 9 STUDENTS”. International Journal of Research -GRANTHAALAYAH 5 (3):140-53. https://doi.org/10.29121/granthaalayah.v5.i3.2017.1761.