Classification
URA - Soil chemistry
37
GNA - Geology - soil sciences
29
LCN - Ecology - soil sciences
5
UHN - Landscape ecology
4
GBE - Geology - endogene processes, exogene processes
3
GUAA - Geography - physical
3
LWH - Agriculture - soil sciences
3
GPA - Geobiology - general
2
GSC - Remote sensing
2
GTAK - Hydrogeology
2
UPVC - Groundwater
2
CMD - Photochemistry - special aspects
1
GAN - Geosciences - mathematical methods, computer applications
1
GBA - General geology, historical geology
1
GBAA - Geology - textbooks
1
GBEU - Weathering
1
GCAA - Regional geology - Germany
1
GDA - Engineering geology - general
1
GHA - Petrology - general
1
GKA - Geophysics - general
1
GMAD - Organic geochemistry
1
GMK - Geochemistry of elements, minerals, rocks
1
GPAB - Flora, vegetation - geographical aspects
1
GRB - Climatology
1
LCNC - Soil science - water transport
1
LWE - Agriculture - general aspects
1
LWO - Agricultural ecology, sustainable agriculture
1
LWW - Agriculture - transfer factors, radioagronomy
1
TBW - Sensors, actuators
1
THL - Thermodynamics - technical aspects
1
UCE - Environmental impact, environmental pollution
1
UCJ - Environmental protection - general aspects
1
UCS - Environmental chemistry
1
UHC - Area planning and environment
1
UPCE - Water chemistry
1
USGH - Contaminated sites
1
UXA - Environmental radioactivity
1
YRA - Social studies
1