Classification
AMAB - Industrial training, further education
6
AMAB - industrial training, further education
4
AMA - Education - general
2
YPB - Economy - general aspects
2
YPD - Business economics
2
YRB - Social sciences, sociology
2
AHJ - Training methods
1
YPGE - Human resource planning, human resource management
1
YPW - Economy of industry branches
1