TY  - BOOK
ED  - National Geographic Society
TI  - Wilderness challenge
SN  - 0870443380
AV  - GV191.4 WIL 
PY  - 0000///Date of publication not identified
PB  - The National Geograhic Society
KW  - Outdoor recreation
KW  - Juvenile literature
KW  - United States
ER  -