共 50 条
- [31] REGULATION AND RATE AND DIRECTION OF INDUCED TECHNICAL CHANGE BELL JOURNAL OF ECONOMICS, 1976, 7 (02): : 478 - 496
- [36] THE RATE OF TECHNICAL CHANGE IN FINNISH AGRICULTURE, 1960 TO 1990 AGRICULTURAL SCIENCE IN FINLAND, 1994, 3 (02): : 151 - 160