TY  - BOOK
AU  - Ley, Willy.
TI  - The poles
T2  - Life Nature Library
U1  - R 91(98/99) L1 
PY  - 1971///
CY  - New York
PB  - Time-Life Books
KW  -  Willy Ley and the editors of time-life books
KW  - Polar regions
ER  -