Inventions by Srilankans
Wednesday, June 26, 2019
https://www.youtube.com/watch?v=q3XUXH76YBE
https://www.youtube.com/watch?v=4rnDjJkhyGA
https://www.youtube.com/watch?v=2hFS5sRAkhw
Monday, June 3, 2019
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https://books.google.lk/books?id=IOEDAAAAMBAJ&pg=PA112&lpg=PA112&dq=why%20diamond%20gem%20inclsions%20do%20not%20give%20a%20star...
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https://youtu.be/4OEbFdXPBp4
