KAMEL, Erian G.;BURGU, Ayşe2019-04-182019-04-181300-0861http://hdl.handle.net/20.500.12575/58214HlSTOPATHOLOGICAL CHANGES IN THE nSSl'ES OF THE FRESH WATER S;\ıAIL GYRAULUS LAEVIS (ALDER) PRODUCED BY PARAi\1PHISTOML'M LARVAL STAGES