?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Petrovic%2C+P.&rft.aulast=Petrovic&rft.aufirst=P.&rft.date=1994&rft.title=Chemical+time+bombs%3A+Hot+spots+in+the+Slovak+part+of+the+Danube+catchment+area&rft.genre=proceeding