Classification
URA - Soil chemistry
12
UCGE - Control of environmental pollution - analytical methods
2
UPT - Water pollution control and measurement
2
CT - Chemical methods of materials analysis
1
GNA - Geology - soil sciences
1
UCG - Control of environmental pollution
1
UCS - Environmental chemistry
1
UMB - Atmospheric chemistry
1
USA - Nonradioactive Waste - general aspects
1
UVF - Environmental aspects of heavy metals and their compounds
1