1972-08-17 /decuslib10-02/01/43,50241/abacus.mac 1974-04-10 /decuslib10-04/01/43,50326/abacus.mac 1975-05-21 /decus_20tap2_198111/01/decus/20-0076/abacus.mac 1975-05-21 /decuslib20-02/01/decus/20-0076/abacus.mac 1980-06-26 /decus_20tap2_198111/01/decus/20-0046/abacus.mac 1980-06-26 /decuslib20-02/01/decus/20-0046/abacus.mac