1. University of Pennsylvania, Ms. Coll 390, Item 1850 DS ID: DS8938 Title: Praśnatantra Author: Nīlakaṇṭha Date: 1751.
2. University of Pennsylvania, Ms. Coll 390, Item 1854 DS ID: DS8942 Title: Praśnatantra Author: Nīlakaṇṭha Date: 1700-1850.