COBOL reference manual : 

 - Mountain View,CA :  MIcro focus ,   1999 
 - (Various pages )  ill.; 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>1569280266 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reference manual
<br/><br/><label>LC Class. No.: </label>QA76.73 .C25 1999