Darken, Jeff, <br/><br/>
English 30 hour clocks :  origin & development, 1600-1800 / 
Jeff Darken and John Hooper. 
 - xiii, 430 pages ;  26 cm 
<br/><br/><label>ISBN: </label>0953074501 9780953074501 
<br/><br/><label>Nat. Bib. No.: </label>GB97X4521  bnb 
<br/><br/><label>Subjects--Chronological Terms: </label><br/>1600-1899 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clocks and watches--History--England--17th century.<br/>Clocks and watches--History--England--18th century.<br/>Clocks and watches--History--England--19th century.<br/>Clocks and watches.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>England.
<br/><br/><label>Subjects--Index Terms: </label>Clock (general) United Kingdom 30 hour History 
<br/><br/><label>Index Terms--Genre/Form: </label><br/>History.