1968-12-18: DS-648
1968-12-17: DS-647
1968-12-16: DS-646
1968-12-13: DS-645
1968-12-12: DS-644
1968-12-11: DS-643
1968-12-10: DS-642
1968-12-09: DS-641
1968-12-06: DS-640
1968-12-05: DS-639
1968-12-04: DS-638
1968-12-03: DS-637
1968-12-02: DS-636
1968-11-29: DS-635
1968-11-27: DS-633/634
1968-11-26: DS-632
1968-11-25: DS-631
1968-11-22: DS-630
1968-11-21: DS-629
1968-11-20: DS-628
1968-11-19: DS-627
1968-11-18: DS-626
1968-11-15: DS-625