Specification of John Hart : separating, distributing, and utilizing sewage.
- Hart, John.
- Date:
- 1870
Licence: Public Domain Mark
Credit: Specification of John Hart : separating, distributing, and utilizing sewage. Source: Wellcome Collection.
20/20
Licence: Public Domain Mark
Credit: Specification of John Hart : separating, distributing, and utilizing sewage. Source: Wellcome Collection.