1982-02-10 /BB-L665B-BM/01/documentation/ddt41a.doc 1982-03-20 /BB-H311C-RM/01/swskit-documentation/ddt41a.doc 1982-03-20 /SRI_NIC_PERM_SRC_3_19910112/01/stanford/5-swskit/ddt41a.doc