Search History Select to load keywords (subject equals "Social Sciences") AND (subject equals "Psychology") AND (subject equals "Mathematics -- Examinations") AND (subject equals "Mathematics -- Study and teaching (Secondary)") AND (author equals "ไพฑูรย์ เอื้อบุญประดิษฐ์") AND (subject equals "Mathematical ability -- Testing") AND (subject equals "คณิตศาสตร์ -- การสอบ")
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