TY  - RPRT
TI  - Stable carbon isotope analysis by optical spectroscopy : progress report
AU  - Ferguson, R E
AU  - Broda, H P
PY  - 1955
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS report ; 4047
DO  - 10.6028/NBS.RPT.4047
ER  -