TY  - BOOK
AU  - Townsend, Colin R.
AU  - Harper, John L.
TI  - Essentials of ecology
SN  - 632043482
U1  - 333.7 
PY  - 2000///
CY  - Massachusetts
PB  - Blackwell Science
KW  - Environmental sciences
KW  - Ecology
N1  - Includes bibliographical references and index
ER  -