Columbia subject headings:
Harvard subject headings:
Computer-assisted instruction--Germany.
Geography--Study and teaching--Computer network resources.
Historians--Training of--Web-based instruction.
History--Study and teaching--Computer network resources.
Internet in education--Germany.
Princeton subject headings:
Computer-assisted instruction--Germany.
Geography--Study and teaching--Computer network resources.
Historians--Training of--Web-based instruction.
History--Study and teaching--Computer network resources.