1. Farmland or wasteland :a time to choose : overcoming the threat to America's farm and food future

پدیدآورنده:

کتابخانه: كتابخانه مركزی كشاورزى (تهران)

موضوع: $ASoil conservation -- United States,$AAgriculture -- United states,$AWater$Bsupply, Agricultural -- United States,$AAgricultural conservation$BUnited States,$AAgriculture and state$BUnited States,$ALand use, Rural$BUnited States,$AWater conservation$BUnited States

رده :
S
624
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A1
S22