Classification
GXAB - Polar research - antarctic region
60
LCO - Hydrobiology
13
GVA - Oceanography
7
GBED - Glaciology
4
GRB - Climatology
3
GKA - Geophysics - general
2
LCQ - Marine research
2
GBH - Marine geology
1
GCA - Regional geology
1
GCAC - Regional geology - noneuropean countries
1
GPAC - Aquatic biology - geographical aspects
1
GRA - Meteorology
1
GSC - Remote sensing
1
GWA - Raw material economy, raw material policy
1
LCD - Ecology - comprensive works
1
UKA - Environmental damage and energy production
1
UMB - Atmospheric chemistry
1
UVH - Environmental aspects of other metals and their compounds
1
UXL - Radiation protection - general aspects
1
YMA - International law
1