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- [5] SPUTUM CONCENTRATION OF DOXYCYCLINE IN CHRONIC-BRONCHITIS AUSTRALIAN AND NEW ZEALAND JOURNAL OF MEDICINE, 1977, 7 (01): : 99 - 99
- [9] CHRONIC-BRONCHITIS - IS BACTERIOLOGICAL EXAMINATION OF SPUTUM NECESSARY BRITISH MEDICAL JOURNAL, 1978, 2 (6136): : 537 - 538