17 June 1970 | 8 December 1970 | 13 April 1971 |
24 May 1971 | 6 July 1971 | 17 August 1971 |
29 September 1971 | 26 January 1972 | 9 March 1972 |
18 April 1972 | 4 July 1972 | 8 August 1972 |
4 December 1972 | 16 January 1973 | 22 May 1973 |
20 June 1973 | 19 July 1973 | 15 August 1973 |
26 September 1973 | 7 November 1973 |