TY  - BOOK
AU  - Bibby,Colin J.
AU  - Burgess,Neil D.
AU  - Hill,David A.
TI  - Bird cencus techniques
SN  - 0120958309
PY  - 1992///
CY  - London
PB  - Academic Press
KW  - Bird populations
KW  - Birds
KW  - Census
ER  -