Topic
940 History of Europe
3
900 History
2
History / Polar Regions
1
Natural resources
1
Natural resources, energy and environment
1
Technology (applied sciences)
1
Technology applied sciences
1
bisacsh:HIS046000
1
energy and environment
1
info:eu-repo/classification/ddc/333.7
1
info:eu-repo/classification/ddc/600
1
infoeu-repo/classification/ddc/333.7
1
infoeu-repo/classification/ddc/600
1