共 50 条
- [3] RESEARCH-AND-DEVELOPMENT, PATENTS, AND PRODUCTIVITY - GRILICHES,Z WELTWIRTSCHAFTLICHES ARCHIV-REVIEW OF WORLD ECONOMICS, 1985, 121 (04): : 792 - 794
- [9] RESEARCH-AND-DEVELOPMENT, PATENTS AND PRODUCTIVITY - GRILICHES,Z CANADIAN JOURNAL OF ECONOMICS-REVUE CANADIENNE D ECONOMIQUE, 1985, 18 (04): : 931 - 933