TY  - BK
AU  - Echeverria,R.G.
TI  - Impact of research and seed trade on maize productivity
PY  - 1988///
KW  - Private firms
KW  - Production factors
KW  - Public enterprises
KW  - Research policies
KW  - Research projects
KW  - Seed industry
KW  - Trade policies
KW  - Zea mays
KW  - AGROVOC
ER  -