Gupta ,V.K.  <br/><br/>
Teaching and learning of science and technology 
V. K. Gupta 
 - Delhi  Vikas   c1995 
 - xix,338p. :tables.  ;21cm. 
<br/><br/><label>ISBN: </label>0706989597 
<br/><br/><label>Dewey Class. No.: </label>507  / GUP