1. Soil Resistivity as Related to Underground Corrosion and Cathodic Protection;Schwerdtfeger;J. Research NBS,1965
2. Adjustment of Soil Corrosion Pit Depth Measurements for Size of Sample;Scott;Proc. An. Petroleum Inst.,1934
3. Distribution of Soil Conductivity and Its Relation to Underground Corrosion;Scott;Jour. AWWA,1960
4. Laboratory Measurement of the Corrosion of Ferrous Metals in Soils;Schwerdtfeger;J. Research NBS,1953