1. Ref. (A), pp 42–48
2. Cooper, L. S. et al ‘Some Aspects of the Reception and Transmission of North Sea Gas’, Gas Council Res. Commn GC150. Obtainable from Instn of Gas Engrs, London
3. Ref. (A), pp 48–49
4. Ref. (B), Part 1, General Analysis
5. Ref.(C), Part 2, Analysis by the Orsat Apparatus