1. Corrosion of water pipe systems due to acidification of soil and groundwater;Levlin,1992
2. Study by polarization techniques of the corrosion rates of aluminium and steel underground for sixteen months;Schwerdtfeger;J. of Research of the National Bureau of Standards,1961
3. Underground corrosion;Romanoff;National Bureau of Standards Circular,1957
4. Soil corrosion studies, 1946: Ferrous metals and alloys;Denison;J. of Research of the National Bureau of Standards,1950