O`Brien, Robert . <br/><br/>
Machines /  Textual Documents 
Robert O`Brien. 
 - 1st ed. / 
 - New York :  Time incorporated ,  1964. 
 - 200p. :  ill ;  24cm . 
<br/><br/>Index 
<br/><br/><label>Subjects--Index Terms: </label>Machines G-Mathematics 
<br/><br/><label>Dewey Class. No.: </label>509  / Ob 6 M