| 其他書名 | The Second Forest Inventory of Iowa Shows that 1.5 Million Acres of Commercial Forest Land Supported More Than 1 Billion Cubic Feet of Growing Stock in 1974 |
| 出版 | U.S. Department of Agriculture, Forest Service, North Central Forest Experiment Station, 1976 |
| URL | http://books.google.com.hk/books?id=FIzZiyfIzu0C&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |