GELDER, S.R., DELMASTRO, G.B. and RAYBURN, J.N. 1999. Distribution of native and exotic branchiobdellidans (Annelida: Clitellata) on their respective crayfish hosts in northern Italy, with the first record of native Branchiobdella species on an exotic North American crayfish. Journal of Limnology. 58, 1 (Feb. 1999), 20–24. DOI:https://doi.org/10.4081/jlimnol.1999.20.