Search History Select to load keywords (type equals "Thesis") AND (dateIssued equals "[1957 TO 1999]") AND (subject equals "Polyethylene") AND (subject equals "Copolymers") AND (subject equals "ยาง") AND (subject equals "โพลิเมอร์ผสม") AND (subject equals "โพลิเอทิลีน") (type equals "Thesis") AND (subject equals "ผลสัมฤทธิ์ทางการเรียน") AND (subject equals "นักเรียนมัธยมศึกษา") AND (dateIssued equals "[2520 TO 2529]") AND (subject equals "Scientific attitude") AND (dateIssued equals "2529") AND (subject equals "Academic achievement")
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