Classification
YUS - Other statistical data
24
LVE - Food science - general
6
LWA - Agriculture - reference books
6
YUD - Comprehensive statistical data - Germany
6
LVH - Food science - technologies
2
GCAA - Regional geology - Germany
1
GNA - Geology - soil sciences
1
TKB - Civil engineering - buildings
1
TKJ - Traffic
1
UPC - Water - general aspects
1
YRA - Social studies
1