title: [The problem of flight crew fatigue (the meaning of the concept, causes, classification)].
mesh_terms: D005221:Fatigue / Q000209:etiology*; D006801:Humans; D008889:Military Personnel; D014586:USSR
vernacular_title: K probleme utomleniia letnogo sostava (soderzhanie poniatiia, prichiny, klassifikatsiia).