The Internet Archive hosts several key collections for those seeking authentic formulas:
One of the most comprehensive digital collections, featuring hundreds of mantras for various life purposes in Hindi. shabar mantra archive.org
A rare guide detailing specific rituals and precautions for Shabar sadhana. The Internet Archive hosts several key collections for
A specialized collection linking specific mantras with their corresponding yantras (sacred diagrams). Origins and the Nath Tradition shabar mantra archive.org
Edited by Pramod Kumar Shastri, this text focuses on "Siddha" or pre-activated mantras that are ready for use.