TY  - BOOK
AU  - Johnson,J.M
TI  - Comparative intensity of land use in Virginia for feed crops cost per pound of total digestible nutrients by counties and production areas, 1959
T2  - Circular ; 
PY  - 1962///
CY  - Blacksburg : 
PB  - Virginia Polytecchnir Institute, Agricultural Experiment Station, 
ER  -