Roy, A. E. <br/><br/>
Astronomy  principles and practice 
A. E. Roy and D. Clarke 
 - Bristol  Adam Hilger  1977 
 - xv, 342p. 
<br/><br/><label>ISBN: </label>0-85274-292-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy<br/>Astronomy and astrophysics thesaurus
<br/><br/><label>Universal Decimal Class. No.: </label>52  / ROY