Classification
AHZ - History of science and technology
PAE - Physics - general interest
11
AFG - Large scale research institutions (Helmholtz Centres)
10
CAD - Chemistry - comprehensive works
7
YPB - Economy - general aspects
5
TKB - Civil engineering - buildings
4
ALD - Biographies of scientists and Nobel prize winners - collected
3
CAH - Chemistry - history
3
DAE - Information technology - general
3
PJA - Atomic physics - general
3
UCA - Environmental problems, man and environment - general aspects
3
YRC - Technology and society
3
AAE - Popular science - general aspects
2
AHF - Research and science
2
EPK - Nuclear energy
2
LAM - Biology - theoretical and philosophical fundamentals
2
TCL - High frequency engineering
2
TNA - Nuclear engineering - general
2
ABM - Special subject biographies
1
AHC - Research and development, research politics - Germany
1
ALE - Biographies of scientists and Nobel prize winners - individual
1
AYA - Sciences - general aspects
1
CAA - Chemistry - reference books
1
CAE - Chemistry - general
1
CRHF - Chemistry of radioactive elements
1
FAM - Solid state physics - general theory
1
FCA - Crystallography
1
FHCB - X-ray scattering
1
FPQ - Surface friction, hardness, wear, lubrication
1
GNA - Geology - soil sciences
1
HCN - Nuclear medicine
1
HRR - X-ray diagnostics, computer tomography
1
LCN - Ecology - soil sciences
1
LHL - Microbiology - general aspects
1
PBG - Relativity, gravitation
1
PLA - Astrosciences - general
1
TCA - Communication science - general
1
TGB - Metrology
1
UCE - Environmental impact, environmental pollution
1
YRA - Social studies
1
YZA - Politics, political science
1