Columbia subject headings:
Academic libraries--Austria--Vienna--Statistics.
Library use studies--Austria--Vienna.
Public services (Libraries)--Austria--Vienna.
Universitätsbibliothek Wien.
Harvard subject headings:
Academic libraries--Austria--Vienna--Statistics.
Library use studies--Austria--Vienna.
Public services (Libraries)--Austria--Vienna.
Universitätsbibliothek Wien
Princeton subject headings:
Academic libraries--Austria--Vienna--Use studies.
Library use studies--Austria--Vienna.
Universitätsbibliothek Wien.