Columbia subject headings:
Harvard subject headings:
Standardization--Germany (East)--History--20th century.
Standardization--Germany (East)--Societies, etc.
Technische Normen, Gütevorschriften und Lieferbedingungen--History--20th century.
Princeton subject headings:
Standardization--Germany (East)--History--20th century.
Standardization--Germany (East)--Societies, etc.