The six Brahmana-Purānas are Brahma-, Brahma Vaivarta-, Vāmana-, Brahmānda-, Mārkandeya, and Bhavishya-Purāna.
Source: The Encyclopedia of Eastern Philosophy and Religion: Buddhism, Hinduism, Taoism, Zen. Shambhala Publications, Inc.
Documents on the Brahmana-Purānas
Books on the Brahmana-Purānas
External links: Puranas / Mahapuranas /
Brahma-Purana / Markadeya-Purana / Bhavishya-Purana / BrahmaVaivarta-Purana / Vamana-Purana / Brahmanda-Purana