| author: | Nasonov NV |
| title: | Material on the turbellarian fauna of Russia I, II, III, IV. Bull. Acad. Sci. Russia, 6th Series, 13 (part 2): pp 619-646(I); 1039-1053 (II&III); 1179-1197 (IV). |
| publication: | Bull.Acad.Sc.Russie Ser 6 13(2),619-646;1039-1053; 1179-1197 |
| year: | 1919 |