Lekka, E., & Lazaridou, ?. (?????.).  (2006).  CREATION OF THE MACROINVERTEBRATE MULTIMETRIC INDEX (MMI) AS A COST-EFFECTIVE METHOD FOR THE EVALUATION OF THE WATER QUALITY STATUS. ??? ???????? ???????? ?????????? ????????? - 28° ???????????? ????????. ????????????? ??? 18? ? 20? ?????, ????????: ???????? ???????? ?????????? ?????????.