Encyclopaedic history of science and technology 
edited by G.R. Chhatwal. 
 - New Delhi  Anmol Publication  1994 
 - 12v., 23cm. 
<br/><br/><label>ISBN: </label>8170418453. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science and technology - Encyclopedia.
<br/><br/><label>Dewey Class. No.: </label>509.03  / E74E