title: Fourth international symposium on night and shift work, sponsored by the Permanent Commission and International Association on Occupational Health, Dortmund, West Germany, 14-17 November 1977. Proceedings.
mesh_terms: D002940:Circadian Rhythm; D003226:Congresses as Topic; D006801:Humans; D009787:Occupational Medicine; D012952:Societies; D013997:Time Factors