Essays in Science :  Written at the Examination / 
National Council of Educational Research and Training Department of Science education New Delhi, India 
 - New Delhi :  NCERT ,  1963 
 - 66 p. :  21 cm. 
<br/><br/> The particilants of the science talent research contast, 1963 
<br/><br/><label>Dewey Class. No.: </label>504