Balma, Phil <br/><br/>
Concurrent PC DOS / 
Phil Balma ... [et al.]. 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  c1986. 
 - x, 178 p. :  ill. ; 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0131672711 
<br/><br/><label>Universal Decimal Class. No.: </label>681.3.066  / BAL