Classification
URA - Soil chemistry
5
UCE - Environmental impact, environmental pollution
3
UCG - Control of environmental pollution
3
UCL - Environmental research
2
UED - Environmental policy
2
UHP - Protection of nature and landscape
2
AEG - Official corporations - Germany
1
GRAH - Cloud physics
1
GRB - Climatology
1
GUA - Geography - general
1
GUAB - Geography - anthropological
1
LCH - Ecology - methods
1
UAX - Environment - information systems, literature guides
1
UCA - Environmental problems, man and environment - general aspects
1
UCGE - Control of environmental pollution - analytical methods
1
UCN - Environmental education
1
UCQ - Environmental technology
1
UEA - Environmental policy and economy - general aspects
1
UEN - Environmental economy
1
UHCH - Urban areas
1
UKA - Environmental damage and energy production
1
UMLE - Air pollution by power plants and industrial plants
1
UMV - Climatic change
1
UPVF - Surface waters - streams, rivers, lakes
1
USGH - Contaminated sites
1
UUD - Ecotoxicology
1
UVA - Environmental chemicals, hazardous materials - comprehensive works
1
UVC - Environmental chemicals, hazardous materials - general aspects
1
UVW - Special effects of hazardous materials
1
UXN - Radiation protection in nuclear facilities
1
UXNB - Radiation protection relating to reactor safety, reactor accidents
1
UXP - Radioactive materials - transport, safety
1
UXS - Radioactive waste management
1