Classification
URA - Soil chemistry
GNA - Geology - soil sciences
100
LWH - Agriculture - soil sciences
70
LCN - Ecology - soil sciences
27
UVF - Environmental aspects of heavy metals and their compounds
13
UPVC - Groundwater
12
LCNA - Soil microbiology
9
UPP - Water pollution
9
UCS - Environmental chemistry
8
UPN - Water protection, water quality, clean water
8
LWV - Agriculture - plant protection
6
UVM - Environmental aspects of hydrocarbons - incl. oil
6
GMK - Geochemistry of elements, minerals, rocks
5
LTN - Biotechnology - biodegradation
5
UHP - Protection of nature and landscape
5
UMB - Atmospheric chemistry
5
UPT - Water pollution control and measurement
5
USGH - Contaminated sites
5
UUD - Ecotoxicology
5
LWE - Agriculture - general aspects
4
LWW - Agriculture - transfer factors, radioagronomy
4
UCG - Control of environmental pollution
4
UCGE - Control of environmental pollution - analytical methods
4
UHN - Landscape ecology
4
UPCE - Water chemistry
4
CTA - Chemical analysis - comprehensive works
3
GMA - Geochemistry - general
3
GPA - Geobiology - general
3
LCH - Ecology - methods
3
LCM - Terrestrial ecology
3
LCNC - Soil science - water transport
3
UAN - Environment - mathematical methods, computer applications
3
UCEB - Environmental pollution
3
UCGN - Control of environmental pollution - biological methods
3
UHC - Area planning and environment
3
UHCH - Urban areas
3
UMN - Air pollution control and measurement
3
UVC - Environmental chemicals, hazardous materials - general aspects
3
UVFD - Environmental aspects of specific heavy metals - cadmium, lead, mercury
3
CTYH - Sampling and sample preparation in chemical analysis
2
CWSH - Extraction
2
GDAB - Rock mechanics, soil mechanics
2
GMAB - Hydrogeochemistry
2
GMAD - Organic geochemistry
2
GTAK - Hydrogeology
2
GTAP - Hydrological investigation methods
2
LCK - Ecology - general aspects
2
LCMG - Animals - ecology
2
LWP - Agriculture - animal husbandry
2
LWVC - Plant protection
2
more ...