TY  - BOOK
AU  - Sutherland,William J.
TI  - Ecological census techniques: a handbook 
SN  - 0521478154
PY  - 1996///
CY  - New York, N.Y.
PB  - Cambridge University Press
KW  - Ecological survey
KW  - Methodology
N1  - Includes bibliographical references and index
ER  -