共 50 条
- [42] PATENTS, RESEARCH-AND-DEVELOPMENT, AND INVENTION POTENTIAL - INTERNATIONAL EVIDENCE [J]. AMERICAN ECONOMIC REVIEW, 1993, 83 (02): : 463 - 468
- [50] FOCUS ON RESEARCH-AND-DEVELOPMENT - IN NEW-ZEALAND [J]. APPITA JOURNAL, 1993, 46 (06): : 402 - 403