Classification
URA - Soil chemistry
19
UVF - Environmental aspects of heavy metals and their compounds
8
LCN - Ecology - soil sciences
4
LCNA - Soil microbiology
3
LWH - Agriculture - soil sciences
3
UCEB - Environmental pollution
2
USGH - Contaminated sites
2
GMA - Geochemistry - general
1
GMK - Geochemistry of elements, minerals, rocks
1
GNA - Geology - soil sciences
1
UCE - Environmental impact, environmental pollution
1
UCG - Control of environmental pollution
1
UHC - Area planning and environment
1