1981-07-13 /BB-H506D-SM_1983/01/cobol/build/btree.rel 1981-07-13 /BB-H506D-SM_1983/01/conversion/utility/btree.rel 1981-07-14 /BB-H580C-SB_1981/04/btree.rel 1981-07-14 /BB-H580C-SB_1981/05/btree.rel 1981-07-14 /BB-H580C-SB_1981/06/btree.rel 1981-07-15 /BB-H580C-SB_1981/07/btree.rel 1981-07-15 /BB-H580C-SB_1981/10/btree.rel 1984-02-22 /BB-Z759A-SM/01/cobol-build/btree.rel 1985-10-04 /BB-H506E-SM/01/cobol/build/btree.rel 1985-10-07 /BB-H506E-SM/01/conversion/utility/btree.rel 1985-10-08 /BB-H580E-SB_1985/05/btree.rel 1985-10-08 /BB-H580E-SB_1985/07/btree.rel 1985-10-08 /cobol12c/05/btree.rel 1985-10-08 /cobol12c/07/btree.rel