TY  - BOOK
ED  - Iowa State College.
TI  - The economics and crop rotations and land use: a fundamental study in efficiency with emphasis on economic balance of forage and grain crops
T2  - Research Bulletin
U1  - 73 630.7 
PY  - 1951///
CY  - Iowa
PB  - [s.n.]
KW  - Administrative report
ER  -