2018-02-132018-02-131981-07-09http://hdl.handle.net/2152.3/5722This image reflects the Electrocardiorecorder Invoice for William Thornton.invoiceBruce Del MarDel Mar AvionicsWilliam ThorntonelectrocardiocorderJohn WallaceSpace MedicineUTMBAmbulatoryBlood Pressure MonitorBlood Pressure Recorder