05-15-68---10-14-68
10-15-68
02-03-69
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04-30-(73)---06-14-(73)
04-01-(74)---06-15-(74)
01-02-(75)---04-30-(75)
06-15-76---09-14-76 vers. 1
06-15-76---09-14-76 vers. 2
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11-15-78---06-14-79
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09-15-79---06-14-80
10-15-79---06-14-80
03-15-80---06-14-80