New legal regulations on inventive and rationalization activities in People's Republic of Bulgaria, Report to be read at "Inventive activity and scientific and technical progress" section
английский/New legal regulations on inventive and rationalization activities in People's Republic of Bulgaria : Report to be read at "Inventive activity and scientific and technical progress" section / I. Ivanov ; Scientific symposium "Inventive activity and scientific and technical progress. Problems of patent information retrieval". Moscow, July 1969.New legal regulations on inventive and rationalization activities in People's Republic of Bulgaria : Report to be read at "Inventive activity and scientific and technical progress" section / I. Ivanov.New legal regulations on inventive and rationalization activities in People's Republic of Bulgaria : Report to be read at "Inventive activity and scientific and technical progress" section.[M./, 1969] ( ). - 1969]. - 12 с. ; 20 см см.New legal regulations on inventive and rationalization activities in People's Republic of Bulgaria : Report to be read at "Inventive activity and scientific and technical progress" section. [M., 1969] .
Отпеч. множит. аппаратом.Изобретательское право -- Съезды, совещания и т. п./nlr_sh1/П5-2265/"Inventive activity and scientific and technical progress. Problems of patent information retrieval", scientific symposium (; 1969; Moscow)/
Отпеч. множит. аппаратом.Изобретательское право -- Съезды, совещания и т. п./nlr_sh1/П5-2265/"Inventive activity and scientific and technical progress. Problems of patent information retrieval", scientific symposium (; 1969; Moscow)/