Roy, A. E.  1924- <br/><br/>
Astronomy :  principles and practice / 
A.E. Roy, D. Clarke. 
 - 3rd ed. 
 - Bristol :  A. Hilger,  1987. 
 - ix, 357 p. :  ill. 
<br/><br/><label>ISBN: </label>0852743947 
<br/><br/><label>LCCN: </label>88990813  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy.
<br/><br/><label>LC Class. No.: </label>QB43.2  / .R68 1987 
<br/><br/><label>Dewey Class. No.: </label>520�19