?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=Violetta&rft.aulast=T%C3%B3th&rft.au=+T%C3%B3th+Violetta&rft.title=Investigation+of+factors+influencing+quit+from+production+in+holstein-friesian+dairy+farms&rft.date=2021&rft.isbn=978-963-306-790-1&rft.genre=proceeding