Search History Select to load keywords (type equals "Thesis") AND (dateIssued equals "[2000 TO 2099]") AND (subject equals "Catalysts") AND (subject equals "เอทิลีน") AND (subject equals "แอลคีน") AND (subject equals "Ethylene") (author equals "พวงเพ็ญ ชุณหปราณ") AND (author equals "พรนิภา ลีละธนาฤกษ์") AND (author equals "นัยนา เตโชฬาร") AND (author equals "นารีรัตน์ รูปงาม")
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