Gould, Rupert T. <br/><br/>
John harrison and his timekeepers/ 
Rupert T. Gould 
 - 4th ed. 
 - Greewich:  National Maritime Museum,  1978 
 - 22 p.:  ill.;  21 cm. 
<br/><br/><label>ISBN: </label> £ 0.35 
<br/><br/><label>Subjects--Personal Names: </label><br/>Harrison, John
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clocks and watches--History<br/>Horology--History
<br/><br/><label>Dewey Class. No.: </label>681.113