The origins of digital computers :   selected papers / 
edited by Brian Randell. 
 - 2nd ed. 
 - New York : bSpringer-Verlag,    1975. 
 - xvi, 464 p. :   ill. ;    24 cm. 
<br/><br/>Includes indexes and references .p. 403-444. 
<br/><br/><label>ISBN: </label>0387071148 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic digital computers--History.<br/>Calculators--History.