TY  - BOOK
AU  - Sutherland,William J.
TI  - Ecological census techniques: a handbook 
SN  - 0521635144
U1  - 574.5028 20
PY  - 1997///
CY  - Cambridge, New York
PB  - Cambridge University Press
KW  - Ecological survey
KW  - Methodology
N1  - Includes bibliographical references and index
ER  -