TY - RPRT TI - Characterization of a composite resin-silica material developed for temporary posterior restorations : progress report AU - Burns, Claire L AU - Barton, John A AU - Chandler, H H PY - 1969 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS RPT 10065 DO - 10.6028/NBS.RPT.10065 ER -