Used a volume-displacement rolling-seal spirometer. From Office Spirometry. A practical guide to the selection and use of spirometers. By PL Enright and RE Hyatt. Published by Lea and Febiger, 1987. Page 131.
Used a volume-displacement rolling-seal spirometer. From Office Spirometry. A practical guide to the selection and use of spirometers. By PL Enright and RE Hyatt. Published by Lea and Febiger, 1987. Page 131.