Kovacs, Charles,  1907-2001. <br/><br/>
Geology and astronomy / 
Charles Kovacs. 
 - Edinburgh :  Floris Books,  2011. 
 - 159 p. :  ill. ;  22 cm. 
 - Waldorf education resource. .
 - Waldorf education resource. .
<br/><br/> Fakulti Sains Bumi  Includes index. 
<br/><br/><label>ISBN: </label>9780863158070 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomy.<br/>Astronomy--Study and teaching (Secondary)<br/>Geology.<br/>Geology--Study and teaching (Secondary)<br/>Waldorf method of education.