Great Scientific invetion # Great scientific inventions 

 - New Delhi  Learners Press  1999 
 - x, 194  Pb 
<br/><br/><label>ISBN: </label>81-7181-468-9 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>500