The Biographical dictionary of scientists :  Astronomers / 
Ed. by A. David. 
 - New York :  Peter Bedrick Books,  1984. 
 - 204 p. ;  25 cm. 
<br/><br/><label>ISBN: </label>0-911745-80-7 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Աստղագիտություն<br/>Dictionary--Science