TY - RPRT TI - Development of methods of test for quality control of porcelain enamels: progress report April 1 through June 30, 1966 AU - Burdick, M D PY - 1966 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 9383 DO - 10.6028/NBS.RPT.9383 ER -