Freshwater planarians (Turbellaria) of North America.
Contributors: Oceanography and Limnology Program (Smithsonian Institution); United States. Environmental Protection Agency.
Series: Biota of freshwater ecosystems identification manual -- no. 1; Water pollution control research series; Biota of freshwater ecosystems identification manual -- no. 1.
Publisher: U.S. Environmental Protection Agency]; for sale by the Supt. of Docs., U.S. Govt. Print. Off.
Published: 1972
Place of publication: [Washington
Language: eng
Number of pages: 81
Subjects: Planaria.; Platyhelminthes -- North America -- Identification.