TY  - BOOK
AU  - Dury,G.H.
TI  - An introduction to environmental systems
SN  - 0435080016
AV  - QE26.2 .D87
U1  - 551 22
PY  - 1981///
CY  - London, Exeter, [N.H.]
PB  - Heinemann Educational Books
KW  - Earth sciences
KW  - Physical geography
N1  - Includes index
ER  -