Culley, Richard Spelman <br/><br/>
A handbook of practical telegraphy / 
Richard Spelman Culley 
 - 5th ed. 
 - London :  Longmans ,  1871 
 - ix, 408 p.;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telegraph--Operators’ manuals<br/>Cables, Submarine