Gaur, V.K. and others <br/><br/>
Science 

 - New Delhi  ; National Council Of Educational Research And Training  , 1989 
 - 244p. 
<br/><br/><label>ISBN: </label> 20 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Dewey Class. No.: </label>500  / GAU