Rwanda 1140-1149

$ 6.89

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Rwanda 1140-1149, MNH, $9.45. Michel 1224-1233. Soil erosion prevention, Driving cattle, Pineapple field, Hedges, ditching, Reforestation, Anti-erosion barriers, Contour planing, Terracing, Protection of river banks, Fallow, planted strips. 1983.