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All Issues: 1972, Volume 51 and 52
- Volume 51, Number 1A: 1 January
- Volume 51, Number 1A_Supplement: 1 January
- Volume 51, Number 1B: 1 January
- Volume 51, Number 2A: 1 February
- Volume 51, Number 2B: 1 February
- Volume 51, Number 2C: 1 February
- Volume 51, Number 3A: 1 March
- Volume 51, Number 3B: 1 March
- Volume 51, Number 4A: 1 April
- Volume 51, Number 4B: 1 April
- Volume 51, Number 5A: 1 May
- Volume 51, Number 5B: 1 May
- Volume 51, Number 6A: 1 June
- Volume 51, Number 6B: 1 June
- Volume 52, Number 1A: 1 July
- Volume 52, Number 1A_Supplement: 1 July
- Volume 52, Number 1B: 1 July
- Volume 52, Number 2A: 1 August
- Volume 52, Number 2B: 1 August
- Volume 52, Number 3A: 1 September
- Volume 52, Number 3B: 1 September
- Volume 52, Number 4A: 1 October
- Volume 52, Number 4B: 1 October
- Volume 52, Number 5A: 1 November
- Volume 52, Number 5B: 1 November
- Volume 52, Number 6A: 1 December
- Volume 52, Number 6B: 1 December