Classification
GVA - Oceanography
210
CBA - Gmelin handbook
147
GBHC - Ocean floor - sediments, morphology
98
GBH - Marine geology
96
YBB - Law - general
95
TEA - Electrical engineering - general
81
THA - Mechanical engineering - general
80
UMB - Atmospheric chemistry
79
YNA - Patents, trademarks
74
UMV - Climatic change
72
ZCB - Information science
71
C - Chemistry ( journals )
67
YPB - Economy - general aspects
64
ZBJ - Library types
60
CT - Chemical methods of materials analysis
59
ZBB - Library staff
59
DKAE - Windows
58
P - Physics ( journals )
56
YPG - Business management
56
ACE - Germanic languages, Indo-Germanic languages
55
AMA - Education - general
55
PAD - Physics - comprehensive works
55
TAA - Engineering sciences - reference books
55
UA - Environment - general
55
GBAH - Stratigraphy, history of earth
53
T - Engineering sciences ( journals )
52
EIP - Photovoltaics
51
UED - Environmental policy
50
YRA - Social studies
49
ZBEBB - Subject indexing
49
ZBEB - Catalogues, cataloguing
48
GAN - Geosciences - mathematical methods, computer applications
46
GWA - Raw material economy, raw material policy
46
THD - Design and construction in mechanical engineering
46
YFA - Labour legislation
45
DNC - Internet
44
HDG - Psychology, psychiatry
44
ZCC - Information technology
43
ACA - Languages, dictionaries - general
42
GMAD - Organic geochemistry
42
CAA - Chemistry - reference books
41
DNA - Computer networks, local area networks
41
GRAD - Earth atmosphere, weather
41
L - Life sciences ( journals )
41
CUW - Mass spectroscopy
40
GRA - Meteorology
40
EFA - Petroleum, natural gas
39
ZAD - Book trade, publishing
39
ZBAE - Conferences
39
TBJ - Integrated circuits
37
more ...