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- [9] EVALUATION OF A HAND-HELD SPIROMETER, THE RESPIRADYNE, FOR THE MEASUREMENT OF FORCED EXPIRATORY VOLUME IN THE 1ST 2ND (FEV1), FORCED VITAL CAPACITY (FVC) AND PEAK EXPIRATORY FLOW-RATE (PEFR) BRITISH JOURNAL OF DISEASES OF THE CHEST, 1988, 82 (01): : 70 - 75