4th Edition - Comprehensive Guide for WIiderness & Travel Medicine - Survival & Emergency First Aid - Dr. Weiss 4th Edition - the Most Up to Date! (2012 edition) Learn Over 50 Improvised Techniques for Surviving Illness & Injury in the Wild! The World's Leading Reference Guide for Wilderness Medicine Pocket Sized! 220 pages at 4.25" x 6" x 0.5" Full of Illustrations, "When to Worry" Tips and Strategies Anyone Can Understand.