International directory of computer and information system services 

 - London  Europa Pub UK       1969 
 - 337p.  cm. 
<br/><br/><label>Standard No.: </label>243,878 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>D65,8(B)n1,N69, K9;1