The Ṛgvedic Nucleus
                           |
                           |
          A                |             B
  Orthodox version         |        Popular version
                           |
           +---------------+--------------+
           |                              |
           |                              |
Aitareya Brāhmaṇa (55+31)           Rāmāyaṇa (48)
Brahma Purāṇa (113)                 Mahābhārata (3)
Bhāgavata (25)                      Harivaṃśa (6)
Devī Bhāgavata (194)                Vāyu Purāṇa (4)