Classification
UVW - Special effects of hazardous materials
6
GPA - Geobiology - general
2
LWH - Agriculture - soil sciences
2
USDE - Domestic waste, plastics, paper
2
HYE - Environmental health
1
UVA - Environmental chemicals, hazardous materials - comprehensive works
1
UVC - Environmental chemicals, hazardous materials - general aspects
1
UVT - Environmental aspects of other hazardous materials
1
YEF - Law on hazardous materials
1