[Mental hygiene as related to human working conditions; with a contribution to World Health Day 1959: "Happy people in our time"].
D014943:Global Health; D006240:Happiness; D006801:Humans; D008603:Mental Health; D016272:Occupational Health
INDUSTRIAL HYGIENE; MENTAL HYGIENE
Zur Psychohygiene der menschlichen Arbeit; zugleich ein Beitrag zum Weltgesundheitstag 1959: "Frohe Menschen in unserer Zeit."