其他書名 | A System for Inventory of Dispersed Recreational Sites in Roaded Areas, Back Country, and Wilderness |
出版 | U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1976 |
URL | http://books.google.com.hk/books?id=OdzggNPDbTMC&hl=&source=gbs_api |
EBook | FULL_PUBLIC_DOMAIN |