1976 – Volume 19–20

  1. Pages i, 633–762
  2. Pages i, 507–632
  3. Pages i, 379–506
  4. Pages i, 253–378
  5. Pages i, 125–252
  6. Pages i, 1–124
  7. Pages 833–832
  8. Pages i, 605–724
  9. Pages i, 489–604
  10. Pages i, 383–488
  11. Pages i, 251–382
  12. Pages i, 121–250
  13. Pages i, 1–120