Classification
A
1
AAA - Encyclopedias - general aspects
4
AAE - Popular science - general aspects
3
ABA - General international and supranational biographic catalogues
2
ABD - National biographic catalogues - Germany
1
ABM - Special subject biographies
3
AEG - Official corporations - Germany
1
AES - Universities, academies - Germany
1
AET - Universities, academies - Europe
5
AFC - Research institutions, scientific organizations - Germany ( DFG, MPG, FHG )
2
AFG - Large scale research institutions (Helmholtz Centres
1
AFG - Large scale research institutions (Helmholtz Centres)
17
AFK - Research institutions - Germany
1
AHA - Research and development, research politics - general
2
AHC - Research and development, research politics - Germany
2
AHE - Research and development, research politics - foreign countries
1
AHF - Research and science
7
AHM - Theory of science
3
AHN - Media and communication science
1
AHNF - Communication design
1
AHP - Philosophy
13
AHPE - Philosophy of Science
1
AHX - History - general
17
AHXB - Archaeology
1
AHZ - History of science and technology
133
AJA - Directories - general
1
ALA - Nobel prize winners - collected papers
2
ALD - Biographies of scientists and Nobel prize winners - collected
6
ALE - Biographies of scientists and Nobel prize winners - individual
3
AMA - Education - general
1
ASBB - Library history - Germany
1
ASEB - Book trade
1
AXD - Local studies
7
AYA - Sciences - general aspects
2
CAA - Chemistry - reference books
2
CAD - Chemistry - comprehensive works
22
CAE - Chemistry - general
1
CAH - Chemistry - history
8
CBA - Gmelin handbook
2
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
DAE - Information technology - general
3
DGA - Computer types, plants and organization
1
DNC - Internet
1
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