Classification
YDS - Building law
13
YPG - Business management
6
YDX - Contract law
5
YPB - Economy - general aspects
4
YDE - Financial law, budgetary law
3
YDM - Commercial law, commercial legislation
3
YHA - Industrial property law, licensing rights
3
YPJ - Accounting
3
ZCA - Documentation
3
DPA - Electronic data processing - applications
2
MSD - Mathematical methods in physics
2
PBB - Quantum theory - special methods
2
YMA - International law
2
YPD - Business economics
2
YZA - Politics, political science
2
ZCB - Information science
2
DWI - Information management
1
HHB - Haematology - comprehensive works
1
MSU - Economic analysis
1
TCB - Communication and information - theory
1
UCA - Environmental problems, man and environment - general aspects
1
UMV - Climatic change
1
USK - Waste water
1
YCA - Public law
1
YMG - Law of international and supranational organizations
1
YPO - Economic policy
1
YRA - Social studies
1
ZAB - Media studies (without bibliology)
1
ZBEBB - Subject indexing
1
ZCC - Information technology
1
ZCD - Information retrieval
1