From The SpiritWiki
Hindu Scriptures are the six "orthodox heads" which form the authoritative scriptures of Hinduism. They may be compared to the four secular sections that arise from "later developments" in the Sanskrit Literature.
- Sivananda, Sri Swami. All About Hinduism. Uttar Pradesh, Himalayas, India: Divine Life Trust, 1999. https://www.academia.edu/32682910.