In copyright
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Credit
The rise & progress of aerobic methods of sewage disposal : being notes of a lecture delivered before the Association of Managers of Sewage Disposal Works at the Royal Sanitary Institute on March 18th, 1911 / by W.J. Dibdin. In copyright. Source: Wellcome Collection.
Provider
This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.