TY  - BOOK
AU  - Pollard  E
TI  - Monitoring Butterflies for Ecology and Conservation : The British Butterfly Monitoring Scheme
U1  - 595.789 
PY  - 1993///
CY  - LONDON
PB  - CHAPMAN & HALL
KW  - Monitoring Butterflies for Ecology and Conservation : The British Butterfly Monitoring Scheme
ER  -