vol. 1, no. 1 (24 February 1970)

vol. 1, no. 2 (April 1970)

vol. 1, no. 3 (9 September 1970)

vol. 1, no. 7 (15 January 1971)

vol. 2, no. 1 (15 February 1971)

vol. 2, no. 2 (15 March 1971)

vol. 2, no. 8 (18 September 1971)

vol. 2, no. 9 (15 November 1971)

vol. 2, no. 10 (15 Deember 1971)

vol. 3, no. 1 (15 January 1972)

vol. 3, no. 2 (15 February 1972)

vol. 3, no. 3 (15 March 1972)

vol. 3, no. 4 (15 April 1972, mis numbered as vol. 4, no. 3)

vol. 3, no. 5 (15 May 1972)

vol. 3, no. 6 (15 June 1972)

vol. 3, no. 8 (15 August 1972)

vol. 3, no. 9 (15 September 1972)

vol. 3, no. 10 (15 October 1972)

vol. 3, no. 11 (15 November 1972)

vol. 3, no. 12 (15 December 1972)

vol. 4, no. 1 (15 January 1973)