TY  - BOOK
ED  - Iowa State University of Science and Technology.
TI  - Economic development of agriculture: the modernization of farming 
AV  - HD 1407 I6
PY  - 1965///
CY  - Ames, Iowa
PB  - Iowa State University
KW  - Agricultura -
KW  - Aspectos económicos
N1  - Incluye bibliografía
ER  -