| 其他書名 | Environmental Concerns for Hikers and Campers |
| 出版 | Stone Wall Press, 1979 |
| 主題 | Nature / EcologySports & Recreation / CampingSports & Recreation / Hiking |
| ISBN | 09132762869780913276280 |
| URL | http://books.google.com.hk/books?id=dts9AAAAMAAJ&hl=&source=gbs_api |