1983-09-01 /BB-H506D-SM_1983/01/cobol/documentation/cobol.bd 1984-02-23 /BB-Z759A-SM/01/documentation/cobol.bd 1985-10-07 /BB-H506E-SM/01/cobol/documentation/cobol.bd 1985-10-10 /BB-H580E-SB_1985/01/cobol.bd 1985-10-10 /cobol12c/01/cobol.bd