TY  - BOOK
AU  - Clark, William R. 
TI  - Explorers of the world
U1  - 923.9 CLA  
PY  - 1964///.
CY  - London : 
PB  - Aldus Books, 
KW  - Discoveries in geography
KW  - Persons-geography
N1  - Includes index.
ER  -