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- catalog contributor b8509555.
- catalog created "1916.".
- catalog date "1916".
- catalog date "1916.".
- catalog dateCopyrighted "1916.".
- catalog extent "239 p., 23 p. of plates :".
- catalog issued "1916".
- catalog issued "1916.".
- catalog language "eng".
- catalog publisher "Washington : Govt. Print. Off.,".
- catalog spatial "Lower Potomac River.".
- catalog subject "Shellfish fisheries Lower Potomac River.".
- catalog subject "Water Pollution.".
- catalog title "Investigation of the pollution and sanitary conditions of the Potomac watershed : with special reference to self purification and the sanitary condition of shellfish in the lower Potomac River / by Hugh S. Cumming. Plankton studies / by W. C. Purdy; and Hydrographic studies / by Homer P. Ritter.".
- catalog type "text".