SPEX 1: 09/80
SPEX 2: 10/80
SPEX 3: 11/80
SPEX 4: 12/80
SPEX 5: 01/81
SPEX 6: 02/81
SPEX 7: 03/81
SPEX 8: 04/81
SPEX 9: 05/81
SPEX 10: 06/81
SPEX 11: 07-08/81
SPEX 12: 09/81
SPEX 13: 10/81
SPEX 14: 11/81
SPEX 15: 12/81
SPEX 16: 01/82
SPEX 17: 02/82
SPEX 18: 03-04/82
SPEX 19: 05/82
SPEX 20: 06/82
SPEX 21: 07/82
SPEX 22: 08/82
SPEX 23: 09/82
SPEX 24: 10/82
SPEX 25: 11/82
SPEX 26: 12/82
SPEX 27: 01/83
SPEX 28: 02/83
SPEX 29: 03/83
SPEX 30: 04/83
SPEX 31: 05/83
SPEX 32: 06/83
SPEX 33: 07/83
SPEX 34: 08-09/83
SPEX 35: 10/83
SPEX 36: 11/83
SPEX 37: 12/83
SPEX 38: 01/84
SPEX 39: 02/84
SPEX 40: 03/84
SPEX 41: 04/84
SPEX 42: 05/84
SPEX 43: 06/84
SPEX 44: 07/84
SPEX 45: 08/84
SPEX 46: 09/84
SPEX 47: 10/84
SPEX 48: 11/84
SPEX 49: 12/84
SPEX 50: 01/85
SPEX 51: 02/85
SPEX 52: 03/85
SPEX 53: 04/85
SPEX 54: 05/85
SPEX 55: 06/85
SPEX 56: 07/85
SPEX 57: 08/85
SPEX 58: 09/85
SPEX 59: 10/85