TY  - BOOK
AU  - Catchpole,C.K.
AU  - Slater,P.J.B.
TI  - Bird song: biological themes and variations 
SN  - 0521417996 :
U1  - 598.259 
PY  - 1995///
CY  - Cambridge
PB  - The University Press
KW  - Birds
KW  - Birdsongs
N1  - Includes bibliographical references and index
ER  -