Sobel, Dava.
Longitude: the true story of a lone genius who solved the greatest scientific problem of his time /
Dava Sobel 
. - London : Fourth Estate,  1996 
. - viii, 184 p.  19 cm. 
<br/>К.: Бібліогр. : c. 179-180, Index 
<br/><label>  ISBN: </label>1-85702-502-4