เลขปริศนา!!อ.ชัยชนะ16/4/62
You never know what you'll run into on a backpacking trip; rain, snow, lightning, rockslides, dehydration, altitude sickness, and the aches and pains associated with hauling a 40-60 pound backpack along mountainous trails. Trekking into the wilderness should not be taken lightly because there are real dangers, but these can be mitigated with the following ten backpacking trip essentials.
from: http://ezinearticles.com/?Ten-Essential-Backpacking-Trip-Must-Haves&id=2775716
