Search History Select to load keywords (dateIssued equals "[1957 TO 1999]") AND (subject equals "Polyethylene") AND (subject equals "Copolymers") AND (subject equals "โพลิเอทิลีน") AND (author equals "Pornpirom Moteplay") (author equals "ผุสตี ปริยานนท์") AND (author equals "รชตะ มณีอินทร์") AND (subject equals "กบ") AND (author equals "ณัฏฐา มธุพยนต์") AND (subject equals "กบทูด")
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