1. University of Pennsylvania, Ms. Coll. 390 Item 627 DS ID: DS7814 Title: Text on logic Author: En Śrīkaṇṭhayya Date: circa 1700-1850.
2. University of Pennsylvania, Ms. Coll. 390 Item 2104 DS ID: DS9171 Title: Text on logic Author: En Śrīkaṇṭhayya Date: circa 1700-1850.