Sonnenuhren :  18 Farbpostkarten. 

 - [18] pages :  illustrations ;  12 cm 
 - Groh-Karten-Bibliothek ;  203 .
<br/><br/><label>ISBN: </label>9783890082035 3890082033 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sundials.
<br/><br/><label>Subjects--Index Terms: </label>Astronomy Germany Mertz Juta Sundials