Buckles, Daniel J.Perales, H.2007-11-131999-09-212007-11-131999http://hdl.handle.net/10625/21848Text1 digital file (p. 32-49)application/pdfenBEANSCULTIVATION SYSTEMSAGRICULTURAL INNOVATIONSFARMERSMEXICOON-FARM RESEARCHINDIGENOUS KNOWLEDGEFarmer - based experimentation with velvetbean : innovation within traditionFarmer - based innovation with velvet bean : innovation within traditionBook Chapter