TY  - BOOK
AU  - Townsend,Colin R.
AU  - Begon,Michael  .
AU  - Harper,John L..
TI  - Essentials of ecology / 
SN  - 1405103280
U1  - 577 
PY  - 2003///
CY  - Oxford : 
PB  - Blackwell Publishers , 
KW  - ECOLOGY
N1  - Includes index and bibliography
ER  -