References
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- Keane , G. Bord Gáis Éireann private communication
- Harlaar , F. and Lydon , P. 1984 . “ Cathodic protection, the technique, materials, and economics ” . In Pipeline Industries Guild Lecture London
- Elliot , I. 1990 . The Sunspot Maximum . Technology Ireland , 21 : 26 – 30 .