Classification
UMK - Air pollution - general aspects
144
UMN - Air pollution control and measurement
16
UMB - Atmospheric chemistry
15
UMD - Atmospheric models
7
UAN - Environment - mathematical methods, computer applications
3
UME - Clean air
3
UMV - Climatic change
3
HYE - Environmental health
2
UHCD - Parks and recreation areas
2
UMC - Atmospheric physics
2
UMR - Effects of air pollution
2
UNA - Noise pollution
2
UPP - Water pollution
2
YED - Law on clean air
2
AEG - Official corporations - Germany
1
CH - Physical chemistry
1
CMD - Photochemistry - special aspects
1
CTYM - Trace analysis
1
CWM - Heat transfer, mass transfer - chemical aspects
1
CXME - Fossil fuel residues - fly ash, coal ash
1
FAF - Materials research - comprehensive works
1
GRA - Meteorology
1
GRAK - Atmospheric precipitations
1
GRB - Climatology
1
LAL - Biology - general aspects
1
LBLC - Paleontology - biological aspects
1
LCK - Ecology - general aspects
1
LCM - Terrestrial ecology
1
LWV - Agriculture - plant protection
1
LWVA - Plant disease
1
TIK - Filter, dust
1
TKD - Air conditioning, refrigeration
1
TKF - Power plants
1
UCA - Environmental problems, man and environment - general aspects
1
UCE - Environmental impact, environmental pollution
1
UCEB - Environmental pollution
1
UCGE - Control of environmental pollution - analytical methods
1
UCQ - Environmental technology
1
UCS - Environmental chemistry
1
UEA - Environmental policy and economy - general aspects
1
UED - Environmental policy
1
UEG - Environmental programs and expertises
1
UENH - Cost factors of air pollution and control
1
UKA - Environmental damage and energy production
1
UKH - Environment and power plants, industrial plants
1
UMA - Atmospheric sciences
1
UMEE - Clean air planning
1
UMG - Technology of clean air
1
UMGD - Clean air technology in fossil fuel and industrial plants
1
UML - Air pollution by special sources
1
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