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RELATION BETWEEN RADIOGRAPHIC CATEGORIES OF COALWORKERS PNEUMOCONIOSIS AND EXPECTATION OF LIFE
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BMJ-BRITISH MEDICAL JOURNAL,
1973, 2 (5865)
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[2]
RESPIRATORY SYMPTOMS AND PULMONARY DISABILITY IN AN INDUSTRIAL TOWN - SURVEY OF A RANDOM SAMPLE OF THE POPULATION
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BMJ-BRITISH MEDICAL JOURNAL,
1956, 2 (OCT20)
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