Freshwater polychaetes (Annelida) of North America
By: by Nancy Foster.
Contributors: Oceanography and Limnology Program (Smithsonian Institution); United States. Environmental Protection Agency.
Series: Biota of freshwater ecosystems identification manual -- no. 4; Water pollution control research series
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: 15
Subjects: Polychaeta -- North America -- Identification.
Notes: Prepared by the Oceanography and Limnology Program, Smithsonian Institution, for the Environmental Protection Agency under contract no. 14-12-894.

Includes bibliographical references.