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- [23] THE MODULATION SYSTEM OF THE AMPEX VIDEO TAPE-RECORDER JOURNAL OF THE SMPTE-SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS, 1957, 66 (04): : 182 - 184
- [24] WHICH VIDEO-TAPE RECORDER FOR MEDICAL EDUCATION MEDICAL AND BIOLOGICAL ILLUSTRATION, 1970, 20 (03): : 173 - &