Specification of Joseph Judge Hays : treating sewage.
- Hays, Joseph Judge.
About this work
London : Great Seal Patent Office, 1871 (London : George E. Eyre and William Spottiswoode)
1 unnumbered page ; 28 cm
At head of title: A.D. 1870, 28th October. No. 2838.
"Joseph Judge Hays, of Hertingfordbury, in the county of Hertford".