Ghai, Shuchita, ed. <br/><br/>
Great scientific inventions 

 - New Delhi  Learness press private limited  1997 
 - x, 193 p.; 21cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Discoveries in sciences<br/>Great scientific inventions<br/>Inventions<br/>Inventions in science