其他書名 | A Summary of Current Information Presented at the Society of American Foresters Annual Meeting at Philadelphia, Pa., October 1968 |
出版 | Northeastern Forest Experiment Station, Forest Service, U.S. Department of Agriculture, 1969 |
URL | http://books.google.com.hk/books?id=Y8dcvQEACAAJ&hl=&source=gbs_api |