Classification
AHK - Scientific work
38
ACE - Germanic languages, Indo-Germanic languages
3
AHF - Research and science
2
AES - Universities, academies - Germany
1
AHL - Presentations, lectures, discussions
1
AHM - Theory of science
1
AHN - Media and communication science
1
DAE - Information technology - general
1
DUA - Text and document processing
1
LAE - Popular biology
1
ZAB - Media studies (without bibliology)
1
ZAC - Bibliology
1
ZBHC - Electronic publishing
1
ZCE - Bibliometrics
1