Sobel, Dava. <br/><br/>
Longitude :  the true story of a lone genius who solved the greatest scientific problem of his time / 
Dava Sobel. 
 - London :  Fourth Estate,  1998. 
 - viii, 184 p. ;  18 cm.+  pbk.  
<br/><br/>Bibliography: p. 177-180. - Includes index. 
<br/><br/><label>ISBN: </label>1857025717 
<br/><br/><label>Subjects--Personal Names: </label><br/>Harrison, John, 1693-1776. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Longitude--Measurement--History. <br/>Chronometers--History. <br/>Clock and watch makers--Biography. --Great Britain
<br/><br/><label>Dewey Class. No.: </label>623.863