In copyright
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Credit
A report to the Chicago Real Estate Board on the disposal of the sewage and protection of the water supply of Chicago, Illinois / by Messrs. George A. Soper, John D. Watson, Arthur J. Martin. In copyright. Source: Wellcome Collection.
Provider
This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.