title: Magnetic tape recorders for low-frequency biological signals: a discussion.
mesh_terms: D003201:Computers; D003936:Diagnosis, Computer-Assisted; D004562:Electrocardiography / Q000295:instrumentation; D004568:Electrodiagnosis / Q000295:instrumentation*; D004569:Electroencephalography / Q000295:instrumentation; D004576:Electromyography / Q000295:instrumentation; D008280:Magnetics; D010991:Plethysmography / Q000295:instrumentation; D013637:Tape Recording / Q000295:instrumentation*