Columbia subject headings:
Harvard subject headings:
Applied linguistics--Germany--History--21st century--Congresses.
Educational technology--Germany--History--21st century--Congresses.
German language--Audio-visual aids--History--21st century--Congresses.
Mass media and education--Germany--History--21st century--Congresses.
Mass media and language--Germany--History--21st century--Congresses.
Social media--Germany--Influence--Congresses.
Princeton subject headings:
Applied linguistics--Germany--History--21st century--Congresses.
Educational technology--Germany--History--21st century--Congresses.
German language--Study and teaching--Audio-visual aids--History--21st century--Congresses.
Mass media and education--Germany--History--21st century--Congresses.
Mass media and language--Germany--History--21st century--Congresses.
Social media--Germany--Influence--Congresses.