TY  - BOOK
AU  - Lewis,Dyfed.
AU  - Swan,Henry.
TI  - Feed energy sources for livestock
U1  - 636.0855 
PY  - 1976///
CY  - London
PB  - Butterworths.
KW  - Animal Science
KW  - Feeding and Feed
KW  - Livestock
ER  -