Concepts units of extension of the indian gondwana   
ed. by B. S. Venkatachala, Hari K. Maheswari 
 - Lucknow  Birbal Sahni Institute of Palaeobotany  1987 
 - 377p. 
 - Palaeobotanist  V.36 .
<br/><br/><label>Dewey Class. No.: </label>561.09  / N87