Hannu Karttunen, Pekka Kröger, Heikki Oja, Markku Putanen, Karl J. Donner <br/><br/>
Fundamental Astronomy 

 -  Springer  Springer  1987 
<br/><br/><label>ISBN: </label>9781461231608 
<br/><br/><label>Source: </label>EBOOK