Sehgal N.K. (Acharya Narendra) Au.; Jayashree Ramam Au.; Sarita Kumar Au.; Arora O. P. Ed. <br/><br/>
Visualised science and technology 
Sehgal N.K. (Acharya Narendra) Au.; Jayashree Ramam Au.; Sarita Kumar Au.; Arora O. P. Ed. 
 - New Delhi, India  Sultan Chand  2134 
 - 214p. 
<br/><br/><label>ISBN: </label>978-81-88237-32-6 
<br/><br/><label>Source: </label>TB