TY - RPRT TI - Standard Reference Materials : Calibration of NBS secondary standard magnetic tape (computer amplitude reference) SRM 3200 using the reference tape amplitude measurement Process A model II/ AU - Geller, Sidney B PY - 1971 PB - National Institute of Standards and Technology CY - Gaithersburg, MD SN - NBS SP 260-29 DO - 10.6028/NBS.SP.260-29 ER -