Hubbard, Geoffrey <br/><br/>
Cooke and wheatstone and the invention of the electric telegraph/ 
Geoffrey Hubbard 
 - London:  Routledge and Kegan Paul,  1965 
 - ix, 158 p.;  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label> $ 27.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telegraph<br/>Communication and traffic<br/>Telecommunication
<br/><br/><label>Dewey Class. No.: </label>621.38209