| Title | Acid rain |
| Publication Type | Miscellaneous |
| Year of Publication | 2011 |
| Authors | Likens, GE, Butler, TJ |
| URL | http://www.britannica.com/EBchecked/topic/3761/acid-rain |
| Title | Acid rain |
| Publication Type | Miscellaneous |
| Year of Publication | 2011 |
| Authors | Likens, GE, Butler, TJ |
| URL | http://www.britannica.com/EBchecked/topic/3761/acid-rain |