TY  - BOOK
AU  - Ridley,B.K.
TI  - The physical environment
SN  - 0470267453 (Halsted)
U1  - 550 
PY  - 1979///
CY  - Ellis Horwood ; New York
PB  - Halsted Press
KW  - Earth sciences
KW  - Astronomy
N1  - Includes index
ER  -