Varma, K. T. Ravi; Shanbhag, S. V.; Thomas, M. K. & Kotoley, C. S. <br/><br/>
Concepts of biology for std. XI 

 - Uttam Prakashan, Bombay  1995 
 - 368 
<br/><br/><label>Dewey Class. No.: </label>574 Var