Barbour, Edna H. <br/><br/>
PL/I  self instructional manual 
by Edna H. Barbour 
 - London  Mac-Millan  1970 
 - vi, 301p.  incl. app., ind. 
<br/><br/><label>Dewey Class. No.: </label>001.6424,  / PL N704