Simple methods of testing sewage effluents : for works managers, surveyors, &c / by George Thudichum.

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Credit

Simple methods of testing sewage effluents : for works managers, surveyors, &c / by George Thudichum. In copyright. Source: Wellcome Collection.

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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.