| 其他書名 | Forest Harvesting Mechanization and Automation, Ottawa-Thunder Bay-Sault Ste. Marie, Canada, September 25 October 5, 1974 |
| 出版 | Canadian Forestry Service, Department of the Environment, 1974 |
| URL | http://books.google.com.hk/books?id=tnoqAQAAMAAJ&hl=&source=gbs_api |