TY - GEN AU - D Nyyssonen C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1986-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.86-3306 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1986 TI - Procedure for calibration of ferrite gaps in magnetic tape heads traceable to NBS AR-chromium optical linewidth SRMs: ER -