| 其他書名 | Buried Weed Seed, Notes on French Weed, Quack Grass, Canada Thistle and Sow Thistle |
| 出版 | North Dakota Agricultural College, Government Agricultural Experiment Station for North Dakota, 1904 |
| URL | http://books.google.com.hk/books?id=68hPAQAAMAAJ&hl=&source=gbs_api |