Columbia subject headings:
Industrial relations--Germany (West)
Siemens & Halske.
Siemens-Schuckertwerke.
Harvard subject headings:
Industrial relations--Germany (West)
Siemens & Halske.
Siemens-Schuckertwerke.
Princeton subject headings:
Industrial relations--Germany (West)
Siemens & Halske.
Siemens-Schuckertwerke A.-G.