| 其他書名 | With Special Reference to the Problem of Its Control in the Bitter Root Valley in Montana |
| 出版 | U.S. Department of Agriculture, Bureau of Entomology, 1911 |
| URL | http://books.google.com.hk/books?id=dVYiAQAAMAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |