Protheroe, W. M. <br/><br/>
Exploring the universe / 
W.M. Protheroe, E.R. Capriotti, G.H. Newson 
 - 2nd ed. 
 - Columbus :  C. E. Merill Pub. Co.,  1981 
 - 478 p. :  ill.;  27 cm. 
<br/><br/><label>ISBN: </label>0675081548 
<br/><br/><label>LCCN: </label>80-84939 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy