TY  - BOOK
AU  - White,I.D.
AU  - .Mottershead,D.N.
TI  - Environmental systems: an introductory text 
SN  - 0045510652
PY  - 1984///
CY  - London
PB  - Allen   Unwin
KW  - Physical geography
KW  - Natural History
N1  - Includes bibliographical references and index
ER  -