| 其他書名 | sugar maple, red oak, black cherry, and yellow-poplar saplings in a 9-year-old stand |
| 出版 | Department of Agriculture, Forest Service, Northeastern Forest Experiment Station, 1978 |
| URL | http://books.google.com.hk/books?id=UVolauNKtfEC&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |