This topic from GENERAL TAMIL(பொதுத் தமிழ்) and contain the complete detail about the topic..
This pdf covers the topic from Class 6 to 12 of the samacheer book (SCERT).
To the topic video and the pdf view, check
https://www.youtube.com/playlist?list=PL5mz0KRAIPbR3OgOsek5KLb7SAVyLv7Up
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