Takhtajan, A. <br/><br/>
Major phytochoria of the late cretaceus and the early tertiary in the U.S.S.R  and adjacent countries 

 - Ranchi :   Birbal Sahni Institute of Palaeobotany,   1966. 
 - 12 p. ;   14 cm. 
 - Sir Albert Charles Seward Memorial Lecture ;   13 .