Essick, Edward L. <br/><br/>
RPG for system/ 360 and system/ 370 / 
Edward L. Essick. 
 - San Francisco :  Canfield Press,  1973. 
 - 289 p. :  ill. ;  28 cm. 
<br/><br/><label>ISBN: </label>0063826259 
<br/><br/><label>Subjects--Topical Terms: </label><br/>RPG (Computer program language).<br/>IBM 360 (Computer)--Programming.<br/>IBM 370 (Computer)--Programming.