1979-10-30 /BB-4172G-BM/01/4-documentation/ddt41.mem 1979-10-30 /BB-5255D-BM/01/4-documentation/ddt41.mem 1979-10-30 /BB-D868C-BM/01/4-documentation/ddt41.mem 1979-10-30 /BB-D868D-BM/01/4-documentation/ddt41.mem 1979-10-30 /BB-H138B-BM/01/4-documentation/ddt41.mem 1979-10-30 /BB-J713A-BM/01/4-documentation/ddt41.mem 1979-10-30 /bb-d868c-bm_tops20_v4_2020_distr/01/4-documentation/ddt41.mem 1980-02-06 /BB-H311C-RM/01/swskit-documentation/ddt41.mem 1980-02-06 /BB-L288A-RM/01/swskit-documentation/ddt41.mem 1980-02-06 /SRI_NIC_PERM_SRC_3_19910112/01/stanford/5-swskit/ddt41.mem 1980-02-09 /BB-H311B-RM/01/swskit-documentation/ddt41.mem