TY - GEN AU - H H Chandler AU - R L Bowen AU - G C Paffenbarger AU - A L Mullineaux C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1969-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.10063 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1969 TI - Clinical investigation of a radiopaque composite restorative material ::progress report ER -