Chacko, P.T. <br/><br/>
Vijnanavum Veekshanavum / 
by P.T. Chacko 
 - Kottayam:  National Book Stall,  1967 
 - p.453 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Dewey Class. No.: </label>500  / CHA-V