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1. The sewage of Worcester in its relation to the Blackstone River: argument of John Hopkins before the Joint Committee on Water-Supply and Drainage of the Massachusetts Legislature, April 2, 1886

4. Ohio River pollution control: letter from the acting secretary of war, transmitting a letter from the chief of engineers, United States Army, dated May 4, 1943, forwarding a report, together with accompanying papers and illustrations, on a survey of the Ohio River and its tributaries for pollution control, authorized by section 5 of the River and harbor act, approved August 26, 1937 (Volume 1)

5. Ohio River pollution control: letter from the acting secretary of war, transmitting a letter from the chief of engineers, United States Army, dated May 4, 1943, forwarding a report, together with accompanying papers and illustrations, on a survey of the Ohio River and its tributaries for pollution control, authorized by section 5 of the River and harbor act, approved August 26, 1937

6. Ohio River pollution control: letter from the acting secretary of war, transmitting a letter from the chief of engineers, United States Army, dated May 4, 1943, forwarding a report, together with accompanying papers and illustrations, on a survey of the Ohio River and its tributaries for pollution control, authorized by section 5 of the River and harbor act, approved August 26, 1937 (Volume 2)

7. Ohio River pollution control: letter from the acting secretary of war, transmitting a letter from the chief of engineers, United States Army, dated May 4, 1943, forwarding a report, together with accompanying papers and illustrations, on a survey of the Ohio River and its tributaries for pollution control, authorized by section 5 of the River and harbor act, approved August 26, 1937 (Part 2, Supplements)