Classification
LWV - Agriculture - plant protection
5
LWE - Agriculture - general aspects
3
UVC - Environmental chemicals, hazardous materials - general aspects
2
AED - Official corporations - international and supranational
1
GNA - Geology - soil sciences
1
LCN - Ecology - soil sciences
1
LCNA - Soil microbiology
1
LHM - Microbiology - genetics
1
LHW - Bacteria - general aspects
1
LWA - Agriculture - reference books
1
LWP - Agriculture - animal husbandry
1
LWVC - Plant protection
1
LWW - Agriculture - transfer factors, radioagronomy
1
UCJ - Environmental protection - general aspects
1
UPP - Water pollution
1
UPVC - Groundwater
1
URA - Soil chemistry
1
UVT - Environmental aspects of other hazardous materials
1