Columbia subject headings:
Electrification--Germany--Berlin--History.
Electrotherapeutics--Germany--Berlin--History.
Industrialization--Germany--Berlin--Psychological aspects.
Mental fatigue--Social aspects--Germany--Berlin--History.
Neurasthenia--Social aspects--Germany--Berlin--History.
Psychiatry--Germany--Berlin--History.
Railroads--Employees--Mental health--Germany--Berlin.
Social change--Germany--Berlin--Psychological aspects.
Soldiers--Mental health--Germany--Berlin.
Telephone operators--Mental health--Germany--Berlin.
Harvard subject headings:
Electrification--Germany--Berlin--History.
Electrotherapeutics--Germany--Berlin--History.
Industrialization--Germany--Berlin--Psychological aspects.
Mental fatigue--Social aspects--Germany--Berlin--History.
Neurasthenia--Social aspects--Germany--Berlin--History.
Psychiatry--Germany--Berlin--History.
Railroads--Employees--Mental health--Germany--Berlin.
Social change--Germany--Berlin--Psychological aspects.
Soldiers--Mental health--Germany--Berlin.
Telephone operators--Mental health--Germany--Berlin.
Princeton subject headings: