Wulff, E.V. <br/><br/>
An Introduction to historical plant geography 
E.V. Wulff. 
 - Dehradun  Bishen Singh Mahendrapal Singh  1993 
 - xv, 223p., ill.; 25cm. 
<br/><br/><label>Dewey Class. No.: </label>581.09  / W94I