Apastamba Pravarakandamu by Mannava Simhachalam Pantulu of 1912 found in Archives.org
Mannava Simhachalam Pantulu
<a rel="nofollow" class="external free" href="https://ia601604.us.archive.org/34/items/in.ernet.dli.2015.372861/2015.372861.Aapantamba-Pravarakaand-damu.pdf">https://ia601604.us.archive.org/34/items/in.ernet.dli.2015.372861/2015.372861.Aapantamba-Pravarakaand-damu.pdf</a>