title: Roentgen examination of pleural fluid; a study of the localization of free effusions, the potentialities of diagnosing minimal quantities of fluid and its existence under physiological conditions.
authors.forename: I
authors.initials: I
authors.lastname: HESSEN
mesh_terms: D001826:Body Fluids; D005122:Exudates and Transudates; D006801:Humans; D010994:Pleura; D013909:Thorax
keywords: PLEURA; THORAX