Experiences with Periyava and Dr. Radhakrishnan's videos
Experience With Maha Periyava By : by T.P. Sriraman (Appa)
https://www.youtube.com/watch?v=jvWyv5kPQ7I
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Experience With Maha Periyava By : HH Mettur Swamigal : (about Gopu Mama)
https://www.youtube.com/watch?v=Hkx6SPJsoyA
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Experience With Maha Periyava By : by Ramian Chitappa
https://www.youtube.com/watch?v=lJXWhqhthao
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Dr. T.I. Radhakrishnan videos:
https://www.youtube.com/watch?v=oUwAW56JHnw
https://www.youtube.com/watch?v=-CgP-SpWe-k
https://www.youtube.com/watch?v=oGc_VzZGcP0