TY  - BOOK
ED  - United States. 
TI  - New Procedures in Estimating Feed Substitution Rates and in Determinig Economic Efficiency in Pork Production
T2  - Research Bulletin
U1  - 73 630.7 
PY  - 1954///
CY  - Ames, Iowa
PB  - Agricultural Experiment Station
KW  - Reports
ER  -