Classification
YPG - Business management
170
UMV - Climatic change
157
FGN - Nanotechnology
146
HCR - Imaging techniques in medicine
138
YPB - Economy - general aspects
132
HDF - Brain - anatomy, function, disorders
131
T - Engineering sciences ( journals )
127
FAF - Materials research - comprehensive works
125
HDG - Psychology, psychiatry
123
HDS - Neurophysiology, neuroanatomy
121
PAD - Physics - comprehensive works
121
MSD - Mathematical methods in physics
118
THQ - Fluid mechanics and dynamics
113
MWH - Statistics
110
TEA - Electrical engineering - general
109
DOL - Programming language - Python
100
EXA - Energy policy
100
TAT - Engineering Standards
99
UA - Environment - general
99
YRA - Social studies
98
EHA - Renewable energy sources
97
CBA - Gmelin handbook
95
TIE - Process engineering
95
P - Physics ( journals )
93
PBA - Quantum theory
93
UMB - Atmospheric chemistry
92
HDE - Neurology - general aspects
91
LKH - Biochemistry - methods
90
PKA - Elementary particles, nuclei - general
89
CT - Chemical methods of materials analysis
88
DNC - Internet
88
PLA - Astrosciences - general
88
ACE - Germanic languages, Indo-Germanic languages
85
LOH - Genetics - methods
85
LWE - Agriculture - general aspects
83
YRB - Social sciences, sociology
83
AHK - Scientific work
82
EWA - Energy economy
82
THA - Mechanical engineering - general
82
UED - Environmental policy
81
AFG - Large scale research institutions (Helmholtz Centres)
79
AHZ - History of science and technology
79
LRH - Cytology - methods
79
AHP - Philosophy
78
LTH - Biotechnology - methods
78
HPK - Special pharmacology, drug design
77
LHL - Microbiology - general aspects
77
CWE - Chemical engineering, chemical industry - general
75
EIP - Photovoltaics
75
YZA - Politics, political science
75
more ...