Pope, Frank Leonard  1840-1895, <br/><br/>
Modern practice of the electric telegraph a handbook for electricians and operators / 
By Frank l. pope 
 - 10 # rev. and enl. 
 - viii, [9], 160 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telégrafo--Operadores manuales
<br/><br/><label>LC Class. No.: </label>TK5263  / P86 1877