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- effectiveness of communication 1
- effectiveness of the learning process 1
- Efficiency 1
- efficiency 89
- efficiency criterion 1
- efficiency factor 2
- efficiency of absorption storage device 1
- efficiency of activities 1
- efficiency of activity 1
- efficiency of agricultural machinery 1
- efficiency of agricultural production 1
- efficiency of educational process 1
- efficiency of innovative activity 1
- efficiency of institutions of higher education 1
- efficiency of international tourism 1
- efficiency of its work 1
- efficiency of learning process 2
- efficiency of personnel management 2
- efficiency of recreation 1
- efficiency of studies 1