Mallick, Birendra Nath. <br/><br/>
Sleep - wakefuleness / 
Birendra Nath Mallick 
 - New Delhi :  National Book Trust,  2001 
 - 108 p. :  ill. ;  21 cm. 
 - Popular science. .
<br/><br/><label>Dewey Class. No.: </label>612.821