Hartmann, William K. <br/><br/>
Astronomy / 
William K. Hartmann 
 - Belmont, Ca. :  Wadsworth Publishing Co.,  1978 
 - xi, 536 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0534005462 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy