?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Engel%2C+Cindy+Reece&rft.aulast=Engel&rft.aufirst=Cindy+Reece&rft.date=2002&rft.title=Acknowledging+the+potential+role+of+animal+self-medication&rft.genre=proceeding