TY  - BOOK
ED  - National Geographic Book Service.
ED  - National Geographic Society (Estados Unidos)
TI  - Into the unknown: the story of exploration 
SN  - 0870446959
AV  - G 80 I58.1987
PY  - 1987///
CY  - Washington, D.C.
PB  - National Geographic Society
KW  - Discoveries in geography
KW  - Descubrimientos geográficos
N1  - Incluye índice; Early Quests -- Pytheas -- To cross the seven seas -- Leif Eriksson and Clan -- Ferdinand Magellan -- The golden Americas -- Hernan Cortes -- By trail and stream -- Meriwether Lewis, William Clark -- West meets East -- Marco Polo -- Alexander David-Neel -- A sea so vast -- Robert O'Hara Burke, William John Willis -- Fatal Africa -- Samuel and Florence Baker -- The last wilderness -- Charles Darwin -- The call of the ice -- Roald Amundsen, Robert Falcon Scott -- Into the deeps -- William Beebe -- Out of the cradle -- Neil Armstrong, Edwin Aldrin, Jr., Michael Collins
ER  -