Prevention of soil erosion
Hoffman, M.H., Turner, A.W., Sunderlin, H.H.
Prevention of soil erosion IV. Earth or adams dam - Ames 1921 - 1-4 p. - Soil, Erosion Iowa Agricultural Extension Service. Bulletin No. 78 .
Prevention of soil erosion IV. Earth or adams dam - Ames 1921 - 1-4 p. - Soil, Erosion Iowa Agricultural Extension Service. Bulletin No. 78 .