Roy, A. E. (Archie E.), 1924-  Roy, A. E. (Archie E.), 1924- <br/><br/>
Astronomy, principles and practice / 
A. E. Roy and D. Clarke. 
 - Bristol :  Hilger,  1977. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 332-333. 
<br/><br/><label>ISBN: </label>a13.1..1.15 a13.2..1.12  L.10.00. 
<br/><br/><label>LCCN: </label>78307420 //r862 
<br/><br/><label>Nat. Bib. No.: </label>GB*** 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy.
<br/><br/><label>LC Class. No.: </label>QB43.2  / .R68 
<br/><br/><label>Dewey Class. No.: </label>520