Popkin, Gary S. <br/><br/>
Advanced structured COBOL / 
Gary S. Popkin 
 - 2nd ed. 
 - Boston, Mass. :  Kent Pub.,  1987 
 - 502 p. ;  28 cm. 
<br/><br/><label>ISBN: </label>0534077889 
<br/><br/><label>LCCN: </label>08-621466 
<br/><br/><label>Subjects--Topical Terms: </label><br/>COBOL (Computer program language)<br/>Structured programming