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, c1995. 
 - viii, 184 p. ;  20 cm. 
<br/><br/> First published: New York : Walker, 1995; "This paperback ed. published in 1998."-- verso. 
<br/><br/>Includes bibliographical references (p. 177-180) and 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/>Clock and watch makers--Great Britain--Biography.