Pollution of navigable waters;
hearings on the subject of the pollution of navigable waters held before the Committee on rivers and harbors, House of Representatives, Sixty-seventh Congress ... Oct. 25 [and Dec. 7 and 8], 1921.
|Corporate Author:||United States.|
Washington, govt. print. off., 1921-
In 2 pts., pt. 2 having independent title page and contents not included in the collation.
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