| 其他書名 | Cost-rate Differentials and Plumbing Permits |
| 出版 | Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory, 1978 |
| URL | http://books.google.com.hk/books?id=P0DVbVERUoAC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |