Jens Olsen's world clock. 

 - Copenhagen :  2d Dept. of the City Administration Executive,  19 66. 
 - 28 p. :  illus., ports ;  21 cm. 
<br/><br/> At head of title: The City Hall of Copenhagen. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Olsen, Jens,  1872-1945. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Astronomical clocks.
<br/><br/><label>Dewey Class. No.: </label>522/.5