Search History Select to load keywords (type equals "Senior Project") AND (dateIssued equals "[2007 TO 2099]") AND (subject equals "ธรณีเคมี") AND (subject equals "Corundum -- Sri Lanka") AND (subject equals "Geochemistry") AND (subject equals "ธรณีเคมี -- ศรีลังกา") (type equals "Thesis") AND (subject equals "ผลสัมฤทธิ์ทางการเรียน") AND (subject equals "นักเรียนมัธยมศึกษา") AND (subject equals "High school students") AND (author equals "ราตรี อิ้วสวัสดิ์") AND (subject equals "วิทยาศาสตร์สิ่งแวดล้อม")
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