Past Papers_BST http://www.doenets.lk/documents/past-papers/2019,AL,NEW,66,S,I,II-04252020145109.pdf 2019 AL BST New Paper http://www.doenets.lk/documents/evaluation-reports/new/66 S- Bio Systems Technology.pdf 2019 AL BST New Marking Scheem http://www.doenets.lk/documents/past-papers/66S1-2(OLD).pdf 2019 AL BST Old Paper http://www.doenets.lk/documents/evaluation-reports/old/66-S-Bio_Systems_Technology.pdf 2019 AL BST New Marking Scheem Old http://www.doenets.lk/documents/past-papers/66Sinhala0102.pdf 2018 AL BST Paper http://www.doenets.lk/documents/past-papers/66singhala0102-09262019215145.pdf 2017 AL BST Paper http://www.doenets.lk/documents/past-papers/66sinhala0102-10232019211054.pdf 2016 AL BST Paper http://www.doenets.lk/documents/evaluation-reports/al/2016/sinhala/66_Bio_System_Technology_Evaluation_Report_2016_AL_(S).pdf 2016 AL BST New Marking Scheem http://www.doenets.lk/documents/past-papers/2015-AL,66,S,I,II-01222020210028.pdf 2015 AL BST Paper http://www.doenets.lk/documents/evaluation-reports/al/2015/sinhala/Bio System Technology AL15S.pdf 2015 AL BST New Marking Scheem