By Sri Alluri Vedachala Josyulu
Brahmasri Dr Nayakanti Mallikarjun Sharma
Bhagavathula Subrahmanyam
Komnduru Rangantha Charyulu
Mohan Publications
Krishna Murthy
Dr Citrala Gurumurty Gupta Sidhanti
M.Satyanarayana Siddanti
Sivala Subrahmanyam
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