Dear Dipak and George,
You might check the following volume: “Atharvavedins in Tantric Territory: The Āṅgirasakalpa Texts of the Oriya Paippalādins and their Connection with the Trika and the Kālīkula, with critical editions of the Parājapavidhi, the Parāmantravidhi,and the *Bhadrakālī-mantravidhiprakaraṇa.” In: The Atharvaveda and its Paippalāda Śākhā: Historical and Philological Papers on a Vedic Tradition, edited by Arlo Griffiths and Annette Schmiedchen. Aachen: Shaker Verlag, 2007, pp. 195–311.
The first two texts are available in The Hamburg Tantric Studies website here.
Hope this helps,
Best