The Ranger's Digest: Filter and Purifying Wat
http://www.therangerdigest.com/Tips___Tricks/Filter_and_Purifying_Water/body_filter_and_purifying_wa
Describes how to filter and purify water.
Transpiration: How would You Get a Drink from a Tr
Explains a technique for obtaining water from a tree.
Wilderness Manuals - Water Procurement
Describes how to find, purify and store water. Features illustrations and links to related topics.