TY - RPRT TI - A laboratory and clinical comparison of silicate cements and a direct filling resin, with and without fused silica: progress report AU - Bowen, R L PY - 1967 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 9611 DO - 10.6028/NBS.RPT.9611 ER -