TY  - BOOK
AU  - Levis, Alexander H.
AU  - Quance, Leroy C.
TI  - System theory applications to agricultural modeling
PY  - 1978///
CY  - Washington, D.C.
PB  - Department of Agriculture
KW  - Agricultura
KW  - Modelos matematicos
KW  - Análisis de sistemas
KW  - Política agrícola
ER  -