Freshwater triclads(Turbellaria) of North America, IX
Kenk, Roman
Freshwater triclads(Turbellaria) of North America, IX the genus sphalloplana - Washington 1977 - 1-38 p. - Freshwater Washington Smithsonian Contributions to Zoology. No. 246 .
Freshwater triclads(Turbellaria) of North America, IX the genus sphalloplana - Washington 1977 - 1-38 p. - Freshwater Washington Smithsonian Contributions to Zoology. No. 246 .