| Description | Covers the following dates:
1 March 1977,
6 March 1978,
2 May 1978,
3 October 1978,
7 November 1978,
5 December 1978,
6 February 1979,
3 April 1979,
8 May 1979,
15 June 1979,
4 September 1979,
7 November 1979,
4 December 1979,
5 February 1980,
4 March 1980,
13 May 1980,
3 June 1980,
4 November 1980,
2 December 1980,
3 February 1981,
3 March 1981,
5 May 1981. |