| Authors(s) | Sperber, C. |
| Year | 1939 |
| Title | Preliminary notes on the genital organs of Nais blanci and Nais josinae. Arkiv för Zoologi 31B(7): 1-5. |
| Authors(s) | Sperber, C. |
| Year | 1939 |
| Title | Preliminary notes on the genital organs of Nais blanci and Nais josinae. Arkiv för Zoologi 31B(7): 1-5. |