Regular Series
Vol. 4 (1973)
| No. 1 – 2 | pp. 3 – 156 | |
| No. 3 – 4 | pp. 161 – 294 | |
| No. 5 – 6 | pp. 301 – 430 | |
| No. 7 – 8 | pp. 437 – 574 | |
| No. 9 – 10 | pp. 579 – 682 | |
| No. 11 – 12 | pp. 689 – 978 |
| No. 1 – 2 | pp. 3 – 156 | |
| No. 3 – 4 | pp. 161 – 294 | |
| No. 5 – 6 | pp. 301 – 430 | |
| No. 7 – 8 | pp. 437 – 574 | |
| No. 9 – 10 | pp. 579 – 682 | |
| No. 11 – 12 | pp. 689 – 978 |