Classification
GWA - Raw material economy, raw material policy
2
UED - Environmental policy
2
EVN - Energy supply - future aspects
1
EXA - Energy policy
1
GRBN - Climatological models
1
GWAA - Raw material programs
1
LAA - Biology - reference books
1
LCK - Ecology - general aspects
1
LCM - Terrestrial ecology
1
LGN - Zoology - anatomy, systematics, embryology
1
PGN - Fusion technology, plasma devices
1
UCL - Environmental research
1
UEF - Sustainability
1
UEG - Environmental programs and expertises
1
UEN - Environmental economy
1
UMD - Atmospheric models
1
UMV - Climatic change
1
YPS - Economy of the developing countries
1
ZBJ - Library types
1