Roy, A. E. <br/><br/>
Astronomy  :  principles and practice / 
A.E. Roy, D. Clarke 
 - Bristol :  Adam Hilger,  1977 
 - xv, 342 p. :  ill.,  28 cm. 
<br/><br/>Bibliography: p. 332-333 
<br/><br/><label>ISBN: </label>0852742924 0852743467pbk 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy