TY  - RPRT
TI  - Reevaluation of the densities of the four NBS silicon crystal standards 
AU  - Bowman, H A
AU  - Schoonover, H A
AU  - Carroll, C L
PY  - 1975
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS IR 75-768
DO  - 10.6028/NBS.IR.75-768
ER  -