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- [21] AIR HYGIENE IN TUBERCULOSIS - QUANTITATIVE STUDIES OF INFECTIVITY AND CONTROL IN A PILOT WARD - COOPERATIVE STUDY BETWEEN THE VETERANS ADMINISTRATION, THE JOHNS-HOPKINS-UNIVERSITY SCHOOL OF HYGIENE AND PUBLIC HEALTH, AND THE MARYLAND-TUBERCULOSIS-ASSOCIATION AMERICAN REVIEW OF TUBERCULOSIS AND PULMONARY DISEASES, 1957, 75 (03): : 420 - 431