Investigation of the pollution and sanitary conditions of the Potomac watershed
Subtitle: with special reference to self purification and the sanitary condition of shellfish in the lower Potomac River
By: by Hugh S. Cumming. Plankton studies / by W.C. Purdy; and Hydrographic studies / by Homer P. Ritter
Contributors: Purdy, W. C.; Ritter, Homer P.
Series: Bulletin (United States -- no. 104.
Publisher: Govt. Print. Off
Published: 1916
Place of publication: Washington
Language: eng
Number of pages: 239
Subjects: Water Pollution; Shellfish; Aquaculture; Water; Pollution
Notes: At head of title: Treasury Department. United States Public Health Service ...