TY  - BOOK
AU  - Catchpole,C.K;Slater,P.J.B;
TI  - Bird song: Biological Themes and Variations
SN  - 0521544009
PY  - 1995///
CY  - UK
PB  - Cambridge University Press.
KW  - Biology
N1  - includes appendix, references and index
ER  -