ACSO-4/AVP RIQS/PL  reference manual DFR22E-5 

 - 2nd ed. 
 -  Tokyo : NEC  1987 
 - 529 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Relational information query system / programmer's language
<br/><br/><label>Dewey Class. No.: </label>519.68/12  / NS