Roy, A. E. <br/><br/>
Astronomy :  structure of the universe / 
A.E. Roy, D. Clarke 
 - Bristol :  Adam Hilger,  1977 
 - 284 p. :  ill. ;  28 cm. 
<br/><br/>Bibliography: p. 276-277 
<br/><br/><label>ISBN: </label>0852743270 0852743475  pbk 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy