Looking at the unborn : historical aspects of obstetric ultrasound : a Witness Seminar held at the the Wellcome Institute for the History of Medicine, London, on 10 March 1998 / Witness Seminar transcript edited by E.M. Tansey and D.A. Christie.

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Looking at the unborn : historical aspects of obstetric ultrasound : a Witness Seminar held at the the Wellcome Institute for the History of Medicine, London, on 10 March 1998 / Witness Seminar transcript edited by E.M. Tansey and D.A. Christie. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.