1. University of Pennsylvania, Ms. Coll 390, Item 2170 Title: Tarkasaṅgrahadīpikāprakāśikā Author: Nīlakaṇṭha Date: circa 1700-1850.
2. University of Pennsylvania, Ms. Coll 390, Item 2171 Title: Tarkasaṅgrahadīpikāprakāśikā Author: Nīlakaṇṭha Date: circa 1700-1850.