Classification
YPW - Economy of industry branches
7
AMAB - Industrial training, further education
1
CAE - Chemistry - general
1
GWA - Raw material economy, raw material policy
1
HYB - Public health, health politics
1
UEN - Environmental economy
1
YPD - Business economics
1
YRB - Social sciences, sociology
1
YUD - Comprehensive statistical data - Germany
1