Volume 2

A study of the pollution and natural purification of the Ohio river / Prepared by direction of the surgeon general.

  • United States. Public Health Service
Date:
1924-
Catalogue details

Licence: Public Domain Mark

Credit: A study of the pollution and natural purification of the Ohio river / Prepared by direction of the surgeon general. Source: Wellcome Collection.

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    -~--=-—-Actual Rainfall ——--—-= Actuql Runoff SOLU] — JyOUNY 3 |jOyUNDY