TY - RPRT TI - Petrographic study of the refractory performance of high-fusing dental alloy investments : Part I - high-fusing phosphate-bonded investments, synchro-x investments AU - Mabie, C P PY - 1971 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS report ; 10610 DO - 10.6028/NBS.RPT.10610 ER -