TY - RPRT TI - Development of methods of test for quality control of porcelain enamels: August 1, 1966 through March 31, 1967 AU - Burdick, M D PY - 1967 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 9511 DO - 10.6028/NBS.RPT.9511 ER -