Classification
CEB - Houben - Weyl handbook
38
UCS - Environmental chemistry
34
CBA - Gmelin handbook
27
CELC - Organic synthesis
27
ACE - Germanic languages, Indo-Germanic languages
26
HCR - Imaging techniques in medicine
25
HDF - Brain - anatomy, function, disorders
25
DOL - Programming language - Python
22
AHK - Scientific work
20
HDE - Neurology - general aspects
20
HDS - Neurophysiology, neuroanatomy
20
LRH - Cytology - methods
20
LOH - Genetics - methods
18
MWH - Statistics
18
FGN - Nanotechnology
17
MSD - Mathematical methods in physics
17
PBA - Quantum theory
17
HPK - Special pharmacology, drug design
16
DKAE - Windows
15
DNC - Internet
15
HDH - Neuropsychology
15
LKH - Biochemistry - methods
15
HBH - Anatomy and cytology of man
14
LON - Molecular genetics
14
UPP - Water pollution
14
CEA - Beilstein handbook
13
CHA - Physical chemistry - comprehensive works
13
DOZ - Programming languages - Other
13
HCG - Radiology
13
HDG - Psychology, psychiatry
13
FAJ - Solid state physics - introductions
12
LGT - Neurobiology, neurophysiology
12
LKD - Biochemistry - comprehensive works
12
PKA - Elementary particles, nuclei - general
12
CAN - Chemistry - mathematical methods, computer applications
11
CUW - Mass spectroscopy
11
DMF - Software engineering
11
FNPE - Nanostructured materials
11
HVA - Internal medicine - comprehensive works
11
LMN - Molecular biophysics, biophysical chemistry
11
MNLS - Computational methods - algorithms, software
11
PGA - Plasma physics
11
CEC - Organic chemistry - comprehensive works
10
CUUB - NMR (Nuclear Magnetic Resonance) spectroscopy
10
DKAI - Unix - operating system
10
DMC - Computer programs
10
DOFC - Programming language - C plus-plus
10
FCAB - X-ray crystallography, X-ray diffraction
10
GKA - Geophysics - general
10
HCD - Biomedical engineering - comprehensive works
10
more ...