| 其他書名 | 1989 -1990 : State of Science, State of Technology, Integrated Assessment |
| 出版 | National Acid Precipitation Assessment Program, Office of the Director, 1989 |
| URL | http://books.google.com.hk/books?id=_bmlEW6jNZgC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |