Classification
GNA - Geology - soil sciences
29
URA - Soil chemistry
12
LWH - Agriculture - soil sciences
5
LCN - Ecology - soil sciences
2
CXUR - Surfactants
1
GCAA - Regional geology - Germany
1
GHMA - Clay, shale
1
GSC - Remote sensing
1
GTA - Hydrology - general
1
GTAK - Hydrogeology
1
TGBE - Electric and electronic measurement
1
UMB - Atmospheric chemistry
1
UPC - Water - general aspects
1
UXW - Underground disposal of radioactive waste
1
YUS - Other statistical data
1