TY  - BOOK
AU  - Ridley,B.K.
TI  - The physical environment
SN  - 0470267453 (Halsted)
PY  - 1979///
CY  - Chichester, Eng.
PB  - Ellis Horwood
KW  - Earth sciences
KW  - Astronomy
N1  - Includes bibliographies and index
ER  -