Freshwater triclads (Turbellaria) of North America: IX : The genus sphalloplana
Kenk, R.
Freshwater triclads (Turbellaria) of North America: IX : The genus sphalloplana - Washington 1977 - 37 p. - No. 246; Smithsonian Contribut .
Freshwater triclads (Turbellaria) of North America: IX : The genus sphalloplana - Washington 1977 - 37 p. - No. 246; Smithsonian Contribut .