Classification
EXA - Energy policy
2
MSU - Economic analysis
2
YPB - Economy - general aspects
2
AHK - Scientific work
1
AHP - Philosophy
1
DPA - Electronic data processing - applications
1
E - Energy ( journals )
1
EAE - Energy - general
1
EHA - Renewable energy sources
1
EWA - Energy economy
1
LWE - Agriculture - general aspects
1
MWB - Stochastic processes
1
Y - Law, economy ( journals )
1
YPD - Business economics
1
YPO - Economic policy
1
YRB - Social sciences, sociology
1