TY - RPRT TI - Methods of measurement for semiconductor materials, process control, and devices : quarterly report, July 1 to September 30, 1969 AU - Bullis, W Murray PY - 1970 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS TN 520 DO - 10.6028/NBS.TN.520 ER -