| 其他書名 | Read at the Congress of the Institute [i.e. The Sanitary Institute], Held at Worcester, 1889. [Excerpt from Vol. X of the Transactions of the Sanitary Institute]. |
| 出版 | Sanitary Institute, 1889 |
| URL | http://books.google.com.hk/books?id=2XzctgAACAAJ&hl=&source=gbs_api |