TY  - BOOK
AU  - Norton, Roger D.,
AU  - Solís M.,Leopoldo
TI  - The book of chac: Programing studies for mexican agriculture 
SN  - 0-808-2585-7
AV  - HD1792 N644
PY  - 1983///
CY  - Baltimore, md.
PB  - Johns hopkins university
KW  - Agricultura
KW  - Aspectos economicos
KW  - Mexico
KW  - Modelos matematicos
ER  -