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2. Hoar, T.P.: ‘Modern aspects of electrochemistry’, Butterworth, London 1959),2, p. 262
3. Campbell, D.S.: ‘The Use of Thin Films in Physical Investigations’, Anderson, J.C., (Academic Press, London 1966), p. 11
4. Lamb, D.R.: ‘Electrical Conduction Mechanisms in Thin Insulating Films’, (Methuen, London 1967)