Hubby, John, <br/><br/>
The story of Anton Harder, father of the 400-day clock / 
by John Hubby. 
 - 5 pages ;  28 
<br/><br/><label>Subjects--Personal Names: </label><br/>Harder, Anton.
<br/><br/><label>Subjects--Topical Terms: </label><br/>Torsion pendulum.<br/>Clocks and watches--Design and construction--History.--Germany<br/>Clock and watch makers--History.--Germany<br/>Pendule de torsion.
<br/><br/><label>Subjects--Index Terms: </label>Shelf clock Germany Anton Harder The author, York Pa biography oeuvre Hubby, John History