Crop management research and extension : the products and their impact on productiviry
/by Greg Traxler and Derek Byerlee
- México, D.F. : Centro Internacional de Mejoramiento de Maíz y Trigo, 1992.
- 57 p. : gráfs. ; tablas
- Economics paper ; 5 .
- CIMMYT .
- Economics paper ; 5 .