ACOS-4/AVP V15 reference manual DFV21E-5 

 -  Tokyo : NEC  1987 
 - 459 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Versatile Information system : V15
<br/><br/><label>Dewey Class. No.: </label>519.68/12  / NS