Historical agriculture and soil erosion in the upper Mississippi Valley hill country - Trimble, Stanley Wayne (CRC Press, 2013)
Keywords: elektronické knihy; electronic books; Soil erosion -- Driftless Area -- History -- 19th century.; Soil erosion -- Driftless Area -- History -- 20th century.; Agriculture -- Environmental aspects -- Driftless Area -- History -- 19th century.; Agriculture -- Environmental aspects -- Driftless Area -- History -- 20th century.