DIN EN 61266:1996-06 Ultrasonics - Hand-held probe doppler foetal heartbeat detectors - Performance requirements and methods of measurement and reporting (IEC 61266:1994); German version EN 61266:1995
1996DIN EN 61266:1996-06 Ultrasonics - Hand-held probe doppler foetal heartbeat detectors - Performance requirements and methods of measurement and reporting (IEC 61266:1994); German version EN 61266:1995
1996DIN EN 61266:1996 Ultrasonics - Hand-held probe doppler foetal heartbeat detectors - Performance requirements and methods of measurement and reporting (IEC 61266:1994); German version EN 61266:1995