Rama Das, V S, et al. <br/><br/>
Biology, Part1: A textbook for senior secondary schools 

 -  National Council of Educational Research and Training, New Delhi  1989 
 - 155 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Dewey Class. No.: </label>574  RAM-B.1