Harley, J. B. <br/><br/>
Ordnance survey maps a descriptive manual / 
By J. B. Harley. 
 - Southampton :  Ordnance Survey,  1975. 
 - xv, 195, [46] p. :  ill., plats, maps ;  31 cm. 
<br/><br/>Bibliography: pp. 185-191; index: pp. 193-200 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Great Britain Ordnance Survey 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cartography--Great Britain<br/>Great Britain--Maps, Popographic