Gregory, R. A. <br/><br/>
The vault of heaven 
R. A. Gregory                                                
 - London  Methuen 
 - viii,188p. 
 - University Extension Series .
<br/><br/> Donated by Mrs. Bappu 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy<br/>Astronomy and Astrophysics Thesaurus<br/>Astrophysics<br/>Telescopes
<br/><br/><label>Universal Decimal Class. No.: </label>52  / GRE