Īśāvāsyōpaniṣat : Satyavrata Bhāskarakṣētramu (Śrī Kāḷahasti) - Sītārāmayya, Pavani (Pratulaku, Sītārāmayya, 1982)
On Kalahasti, Shaivite pilgrimage center, Chittoor District, Andhra Pradesh.