Classification
YEF - Law on hazardous materials
2
CAV - Chemicals, chemical reagents
1
HDG - Psychology, psychiatry
1
LGT - Neurobiology, neurophysiology
1
UA - Environment - general
1
UVA - Environmental chemicals, hazardous materials - comprehensive works
1
UVC - Environmental chemicals, hazardous materials - general aspects
1
YBB - Law - general
1