Columbia subject headings:
German language--Grammar, Comparative--Russian.
German language--Particles.
Russian language--Grammar, Comparative--German.
Russian language--Particles.
Harvard subject headings:
German language--Grammar, Comparative--Russian.
German language--Particles.
Russian language--Grammar, Comparative--German.
Russian language--Particles.
Princeton subject headings:
German language--Grammar, Comparative--Russian.
German language--Particles.
Russian language--Grammar, Comparative--German.
Russian language--Particles.