TY  - BOOK
AU  - Preuschoft,Holger
TI  - The Lesser apes: evolutionary and behavioural biology 
SN  - 0852244487
PY  - 1984///
CY  - Edinburgh
PB  - Edinburgh University Press
KW  - Gibbons
KW  - Siamang
N1  - Includes index; Bibliography : p.639-685
ER  -