hatmann william K. <br/><br/>
astronomy the cosmic journey 
william K. hartmann 
 - california  wadsworth publishing  1987 
 - xxiii, 548p, ill.  hbk 
<br/><br/><label>ISBN: </label>053404011X 
<br/><br/><label>LC Class. No.: </label>QB45.H3 1985