Classification
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AYA - Sciences - general aspects
2
CAA - Chemistry - reference books
2
CBA - Gmelin handbook
2
GCAA - Regional geology - Germany
2
MAA - Mathematics - reference books
2
MDA - Foundations of mathematics
2
MEA - Number theory - general
2
PBA - Quantum theory
2
PBG - Relativity, gravitation
2
PEG - Optics
2
TCA - Communication science - general
2
TKL - Mining - technical aspects
2
YBB - Law - general
2
ZAA - Books - general
2
ZBAD - Library science
2
ZBJB - Library federations
2
A
1
AAA - Encyclopedias - general aspects
1
ABD - National biographic catalogues - Germany
1
AEG - Official corporations - Germany
1
AES - Universities, academies - Germany
1
AFG - Large scale research institutions (Helmholtz Centres
1
AFK - Research institutions - Germany
1
AHE - Research and development, research politics - foreign countries
1
AHN - Media and communication science
1
AHNF - Communication design
1
AHPE - Philosophy of Science
1
AHXB - Archaeology
1
AJA - Directories - general
1
AMA - Education - general
1
ASBB - Library history - Germany
1
ASEB - Book trade
1
CAE - Chemistry - general
1
CBB - Inorganic chemistry - comprehensive works
1
CLP - Colloid chemistry, surface chemistry
1
CR - Nuclear chemistry, radiation chemistry
1
CRHF - Chemistry of radioactive elements
1
CT - Chemical methods of materials analysis
1
CTR - Chromatography
1
CWA - Chemical engineering - reference books
1
DAA - Information technology - reference books
1
DGA - Computer types, plants and organization
1
DNC - Internet
1
DYA - Artificial intelligence
1
EAE - Energy - general
1
EBA - Energy production, energy technology
1
EEA - Coal - general
1
EFA - Petroleum, natural gas
1
EIM - Solar architecture
1
EKA - Wind energy
1
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