1. Underground Corrosion National Bureau of Standards Circ. 579 1957
2. Various publications of Natl Assn. of Corrosion Engineers Houston, Tex.
3. Mudd , O. C. Control of Pipeline Corrosion. Natl. Assn. of Corrosion Engineers Houston, Tex.
4. Suggested Nontechnical Manual on Corrosion for Water Works Operators;Hertzberg;Jour. AWWA,1956