TY - BOOK AU - Venkatachala, B. S., ed. AU - Maheswari, Hari K., ed. TI - Concepts units of extension of the indian gondwana T2 - Palaeobotanist U1 - 561.09 PY - 1987/// CY - Lucknow PB - Birbal Sahni Institute of Palaeobotany ER -