| author: | Kawakatsu M, Teshirogi W, Tokui T |
| title: | Record of a freshwater planarian, Polycelis sapporo (Ijima et Kaburaki, 1916), from the bottom of Lake Towada-Ko in North Japan, with a note on the southern limit of distribution of this species. |
| publication: | Physiol Ecol Japan 17:477-483 |
| year: | 1976 |