1. De morbis artifican (Diseases of workers);Ramazzini,1940
2. De morbis artifican (Diseases of workers);Ramazzini,1940
3. The frequency of occurrence, impact and cost of selected musculoskeletal conditions in the United States;Holbrook,1984
4. Upper extremity disorders-a survey of their frequency and cost in the United States;Kelsey,1980