Search History Select to load keywords (dateIssued equals "[2000 TO 2099]") AND (subject equals "Catalysts") AND (subject equals "เอทิลีน") AND (subject equals "Ethylene") AND (dateIssued equals "2006") (subject equals "ผลสัมฤทธิ์ทางการเรียน") AND (author equals "รุ่งอรุณ ลียะวณิชย์") AND (subject equals "Mathematical recreations") AND (subject equals "Counting")
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