TY  - BOOK
AU  - Petrusewicz K
AU  -  Macfadyen A
TI  - Productivity of terrestrial animals principles and methods
T2  - IBP handbook; 13
U1  - K2:7, L0 
PY  - 1970///
CY  - London
PB  - International biological programme       
KW  - Animal husbandry
ER  -