?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Heather&rft.aulast=Hessel&rft.au=Hessel%2C+Heather&rft.title=Invoices%3A+From+ALEPH+to+PeopleSoft+(and+Back+Again)&rft.date=1+August+2008&rft.genre=proceeding