共 50 条
- [34] PREFERRED PUSHBUTTON SWITCH OPERATING FORCES IEEE TRANSACTIONS ON SYSTEMS MAN AND CYBERNETICS, 1971, SMC1 (04): : 385 - +
- [36] PROBLEM OF SERIAL TESTS ON TELEPHONE PUSHBUTTON SETS NTZ-COMMUNICATIONS JOURNAL, 1966, 5 (02): : 64 - &
- [39] PUSHBUTTON TELEPHONE FOR ALPHANUMERIC INPUT - 2 EXTRA BUTTONS DATAMATION, 1966, 12 (04): : 27 - 30