Cox, L W The design of a foetal heart ratemeter. [electronic resource] - The Australian & New Zealand journal of obstetrics & gynaecology 06 1963 - 60-2 p. digital Publication Type: Journal Article ISSN: 0004-8666 Standard No.: 10.1111/j.1479-828x.1963.tb00217.x doi Subjects--Topical Terms: ElectrocardiographyFetal HeartHumansPhonocardiography