Ronald G. Perkin, Edward Lyn Lewis; The Practical Salinity Scale 1978: Fitting the data, IEEE J. Oceanic Eng., vol. 5, pp. 9 - 16, January 1980.

E. L. Lewis, R. B. Sudar; A Salinity Chain for Estuarine Use, Proceedings of MTS/IEEE OCEANS'78 Conference, pp. 169 - 172, September 1978.

R. G. Perkin, E. L. Lewis; Direct calibration of in situ CTD's, OCEANS'74 --- IEEE International Conference on Engineering in the Ocean Environment, pp. 234 - 236, August 1974.

Edward L. Lewis; A tide gauge for use in remote areas, OCEANS'73 --- IEEE International Conference on Engineering in the Ocean Environment, pp. 504 - 507, September 1973.