1. The breakdown of pesticides in soils;Alexander,1967
2. The Physics of Blown Sand and Desert Dunes;Bagnold,1941
3. Soil erosion — a national menace;Bennett,1928
4. General aspects of the soil erosion problem;Bennett,1938
5. Estimate of organic carbon in world soils II;Bohn;Soil Sci. Soc. Am. J.,1982