| 其他書名 | A Summary of Findings from the National Park Service Air Quality Research and Monitoring Program |
| 出版 | U.S. Department of the Interior, National Park Service, Air Quality Division, 1988 |
| URL | http://books.google.com.hk/books?id=pnNxFU-WGasC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |