共 50 条
- [41] INTELLECTUAL PROPERTY-RIGHTS PROTECTION IS THE KEY IN TELECOMMUNICATIONS CONVERGENCE SEARCH, 1995, 26 (05): : 139 - 139
- [42] BARITE - PRODUCTION DOWN IN UNITED-STATES, UP ELSEWHERE E&MJ-ENGINEERING AND MINING JOURNAL, 1977, 178 (03): : 130 - 132
- [48] CONNECTING WITH INFORMATION ON THE UNITED-STATES TELECOMMUNICATIONS INDUSTRY DATABASE, 1992, 15 (01): : 75 - 77