Agricultural Systems 111: 63-74. doi: 10.1016/j.agsy.2012.05.005
Cultivation of maize landraces by small-scale shade coffee farmers in western El Salvador
Olson, M.B., K.S. Morris and V.E. Méndez |
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Agricultural Systems 111: 63-74. doi: 10.1016/j.agsy.2012.05.005