The GEC journal of technology : incorp. the Marconi review Volume 13 Issue 3 Issue 2 Issue 1 Volume 12 Issue 3 Issue 2 Issue 1 Volume 11 Issue 3 Issue 2 Issue 1 Volume 10 Issue 3 Issue 2 Issue 1 Volume 9 Issue 3 Issue 2 Issue 1 Volume 8 Issue 3 Issue 2 Issue 1