Kovacs, Charles <br/><br/>
Geology and Astronomy / 
Charles Kovacs 
 - London  Floris Books  2012 
 - 160 p.  22 cm. 
 - Waldorf Education Resources .
<br/><br/><label>ISBN: </label>978-0863158070 
<br/><br/><label>Subjects--Topical Terms: </label>--Study and Teaching--Astronomy