2009年9月3日 · Gemsbok Bean & Kalahari truffle, traditional plant use by Jul'hoansi in N.East Namibia - Arno Leffers Snow Caves - Ernest Wilkinson Emergency Navigation - David Burch The Basic Essentials of Desert Survival - Dave Ganci Dwelling Portably 1980-89 - Bert and Holly Davis Dwelling Portably 1990-99 - Bert and Holly Davis