1981-02-02 /BB-H580C-SB_1981/01/68274.mem 1983-09-01 /BB-H506D-SM_1983/01/cobol/documentation/68274.mem 1985-10-04 /BB-H506E-SM/01/cobol/documentation/68274.mem 1985-11-07 /BB-H580E-SB_1985/01/68274.mem 1985-11-07 /cobol12c/01/68274.mem