Specification for telegraph material :  (insulators, pole fittings, etc.) / 
British Standards Institution. 
 - 44 pages :  illustrations ;  33cm. 
 - British standard ;  BS 16 : 1974 .
 - British standard ;  BS 16 : 1974 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telegraph--Equipment and supplies--Standards.<br/>Telegraph--Equipment and supplies--Installation.