Search History Select to load keywords (type equals "Thesis") AND (subject equals "ผลสัมฤทธิ์ทางการเรียน") AND (subject equals "นักเรียนมัธยมศึกษา") AND (subject equals "วิทยาศาสตร์สิ่งแวดล้อม") AND (subject equals "High school students") AND (dateIssued equals "[2529 TO 2529]") AND (author equals "ราตรี อิ้วสวัสดิ์")
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