Classification
USGH - Contaminated sites
47
UMN - Air pollution control and measurement
9
USGE - Waste depositories
8
GRAK - Atmospheric precipitations
7
URA - Soil chemistry
5
USG - Waste treatment, waste disposal
5
UCG - Control of environmental pollution
4
UXN - Radiation protection in nuclear facilities
4
CTD - Chemical analysis - general aspects
3
USR - Slurry, sludge - treatment and use
3
UVF - Environmental aspects of heavy metals and their compounds
3
UXCD - Radioactive emission by nuclear facilities
3
GHHD - Sedimentary transport, sedimentation
2
UCE - Environmental impact, environmental pollution
2
UCGN - Control of environmental pollution - biological methods
2
USDN - Hazardous waste - incl. waste oil
2
USNG - Waste water treatment - biological aspects
2
UVM - Environmental aspects of hydrocarbons - incl. oil
2
CTDP - Reagents and reference materials in analytical chemistry
1
GBHC - Ocean floor - sediments, morphology
1
LWH - Agriculture - soil sciences
1
LWV - Agriculture - plant protection
1
UHCH - Urban areas
1
UHN - Landscape ecology
1
UPVF - Surface waters - streams, rivers, lakes
1
USNH - Waste water treatment - special methods
1
UUD - Ecotoxicology
1
UXNB - Radiation protection relating to reactor safety, reactor accidents
1