Guide to Water Purification Topics: BackpackingHikingLeader TrainingTechnical SkillsOA Guide to Water Purification The Backpacker's Field Manual by Rick Curtis published by Random House 2005 Available at Amazon.com
The Backpacker's Field Manual Topics: BackpackingLeader TrainingLeave No TraceTechnical SkillsThe Backpacker's Field Manual A Comprehensive Guide to Mastering Backcountry Skills by Rick Curtis, Director, Princeton University Outdoor Action Program Second Edition published by Three Rivers Press division of Random House, May 2005