Classification
GBEC - Geomorphology
2
GRB - Climatology
2
UMV - Climatic change
2
URA - Soil chemistry
2
GUA - Geography - general
1
GUAA - Geography - physical
1
LCV - Ecology - models
1
LWH - Agriculture - soil sciences
1
MWHL - Modeling, classification, clustering
1
UAM - Environmental models
1
UAN - Environment - mathematical methods, computer applications
1
UCA - Environmental problems, man and environment - general aspects
1
UCE - Environmental impact, environmental pollution
1
UCG - Control of environmental pollution
1
UED - Environmental policy
1
UKE - Environment and energy resources
1
UKH - Environment and power plants, industrial plants
1
UPC - Water - general aspects
1