Classification
TAA - Engineering sciences - reference books
7
PAA - Physics - reference books
6
CH - Physical chemistry
3
EXA - Energy policy
3
CB - Inorganic chemistry
2
DPA - Electronic data processing - applications
2
FAAC - Engineering materials - reference books
2
FPM - Materials testing - general aspects
2
ACA - Languages, dictionaries - general
1
ACH - Romance languages
1
ACZ - Lists of abbreviations
1
AFM - Research institutions - Europe
1
AZZ - Firm index - general
1
CE - Organic chemistry
1
CHJ - Molecular physics, molecular structure
1
CUA - Spectroscopy
1
CWB - Chemical engineering - comprehensive works
1
CWE - Chemical engineering, chemical industry - general
1
CXUR - Surfactants
1
DAA - Information technology - reference books
1
EHA - Renewable energy sources
1
FAAA - Crystallography - reference books
1
FAAD - Metallic materials - reference books
1
FAAE - Nonmetallic materials - reference books
1
FCA - Crystallography
1
FFJK - Surface reactions
1
FFM - Liquid interfaces, adhesion
1
FMPJ - Steels and ferrous alloys for specific applications
1
FNJ - Plastics - general aspects
1
GHH - Sedimentary petrography - general
1
GHM - Sedimentary rocks
1
LAA - Biology - reference books
1
LWE - Agriculture - general aspects
1
TAB - Engineering sciences - dictionaries
1
TBC - Electronic circuits
1
TBF - Semiconductor devices
1
TBJ - Integrated circuits
1
TBS - Digital electronics
1
TNA - Nuclear engineering - general
1
TND - Gas cooled reactor types
1
UA - Environment - general
1
UPCE - Water chemistry
1
UPK - Water resources, water supply
1
UPW - Drinking water
1
YEF - Law on hazardous materials
1
YEM - Energy law
1
YNA - Patents, trademarks
1
YPB - Economy - general aspects
1
YZA - Politics, political science
1