Hamilton, L H Acoustic helium analyzer for closing volume measurement. [electronic resource] - Journal of applied physiology: respiratory, environmental and exercise physiology Nov 1977 - 911-5 p. digital Publication Type: Journal Article ISSN: 0161-7567 Standard No.: 10.1152/jappl.1977.43.5.911 doi Subjects--Topical Terms: Closing VolumeHeliumHumansLung--physiologyLung Volume Measurements--instrumentation