Columbia subject headings:
Harvard subject headings:
English language--Aspect
English language--Grammar, Comparative--German
German language--Aspect.
German language--Grammar, Comparative--English.
German language--Grammar, Comparative--Greek.
Grammar, Comparative and general--Aspect.
Grammar, Comparative and general.
Greek language--Aspect.
Greek language--Grammar, Comparative--German.
Princeton subject headings:
German language--Grammar, Comparative--Greek.
Grammar, Comparative and general--Aspect.
Grammar, Comparative and general.
Greek language--Grammar, Comparative--German.