AMERICAN THORACIC SOCI; AMERICAN THORACIC SOCI; BRITISH MEDICAL RESEAR; HEW, DEPT OF HEALTH EDUCATION AND WELFARE; INTL ASSOC OF HEAT & F; INTL LABOUR OFFICE; MEDICAL RESEARCH COUNC; NATL HEART & LUNG INST; OSHA, OCCUPATIONAL SAFETY & HEALTH ADMINISTRATION; SOCIAL SECURITY ADMINI; US BUREAU OF LABOR STA; US HOUSE; 790000 SURGEON GENERAL; 840000 SURGEON GENERAL