Columbia subject headings:
Apprentices--Rhine River Valley--Language--Case studies.
Business communication--Rhine River Valley--Case studies.
Career development--Rhine River Valley--Case studies.
Multilingualism--Rhine River Valley--Case studies.
Harvard subject headings:
Princeton subject headings:
Apprentices--Rhine River Valley--Language--Case studies.
Business communication--Rhine River Valley--Case studies.
Career development--Rhine River Valley--Case studies.
Case studies.
English language--Business English--Case studies.
French language--Business French--Case studies.
German language--Business German--Case studies.
Multilingualism--Rhine River Valley--Case studies.