Keller, Horst <br/><br/>
Abap objects : an introduction to programming sap applications 

 - Delhi  Pearson Education  2002 
 - xiv, 556p.  
<br/><br/> CDBK2235. Includes bibliographical references, glossary and index. 
<br/><br/><label>ISBN: </label>9788129706713 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Abap -- advanced business application programming<br/>Sap -- business system -- software application