Ledgard, Henry. <br/><br/>
From baker street to binary / 
HenryLedgard, E. Patrick McQuaid and Andrew Singer 
 - New York :  McGraw - Hill Book,  c1983 
 - 277 p. :  illus 
<br/><br/><label>ISBN: </label>0070369836 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Computers.<br/>Programming (Electronic computers)
<br/><br/><label>Dewey Class. No.: </label>621.C533  / L472F