Armstrong, Russell M. <br/><br/>
Modular planning in COBOL / 
by Russell M. Armstrong 
 - New York :  Wiley-Interscience,  1973 
 - xi,211 p. :  ill. ;  24 cm. 
 - Business data processing .
<br/><br/><label>ISBN: </label>0471033251 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>COBOL (Computer program language)
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic digital computers--Programming