Columbia subject headings:
Harvard subject headings:
German language--Foreign elements--Polish
German language--Grammar, Comparative--Polish.
Interference (Linguistics)
Languages in contact.
Polish language--Foreign elements--German
Polish language--Grammar, Comparative--German.
Princeton subject headings:
Comparative linguistics--Congresses.
German language--Influence on Polish--Congresses.
Languages in contact--Congresses.
Polish language--Influence on German--Congresses.