Classification
ZBDA - Library management
53
ZBJ - Library types
8
ZBE - Library administration
7
ZBB - Library staff
3
ZBD - Library economy
3
ZBDB - Quality management
3
ZBHA - Library systems
3
ZBJA - Special libraries
3
YPD - Business economics
2
ZBAD - Library science
2
ZBDC - Library marketing
2
ZBH - Digital library
2
ZCB - Information science
2
ZCC - Information technology
2
UAU - Fire, fire protection, safety at the workplace, prevention of accidents
1
ZAC - Bibliology
1
ZBAA - General (incl. bibliographies)
1
ZBAE - Conferences
1
ZBAF - Festschrifts
1
ZBEA - Acquisition, collection development
1
ZBEBA - author, title approach
1
ZBEBB - Subject indexing
1
ZBEC - Reader services, inquiry service
1
ZBJD - Libraries and library science - international
1
ZEA - Archives
1