TY  - RPRT
TI  - X-ray-opaque reinforcing fillers for composite materials : progress report
AU  - Bowen, R L
PY  - 1968
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS report ; 9916
DO  - 10.6028/NBS.RPT.9916
ER  -