Classification
FAF - Materials research - comprehensive works
10
FHA - Materials characterization - general aspects
3
UMB - Atmospheric chemistry
3
FMKD - Melting, solidification
1
GHMA - Clay, shale
1
GRAD - Earth atmosphere, weather
1
GWBA - Raw material resources, raw material reserves
1
LCL - Biotopes, ecosystems
1
LCM - Terrestrial ecology
1
LCV - Ecology - models
1
UHN - Landscape ecology
1
UMK - Air pollution - general aspects
1
UMNE - Air pollution by gaseous pollutants
1