?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=%D0%92%D0%B8%D1%81%D0%BA%D1%83%D1%88%D0%B5%D0%BD%D0%BA%D0%BE%2C+%D0%94.+%D0%90.&rft.aulast=%D0%92%D0%B8%D1%81%D0%BA%D1%83%D1%88%D0%B5%D0%BD%D0%BA%D0%BE&rft.aufirst=%D0%94.+%D0%90.&rft.date=22+%D0%A1%D0%B5%D1%80%D0%BF%D0%B5%D0%BD%D1%8C+2004&rft.title=The+effect+of+heavy+metals+on+the+pond+snail+Lymnaea+stagnalis+&rft.genre=proceeding