TY - GEN AU - R E Ferguson AU - H P Broda C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1955-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.RPT.4047 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1955 TI - Stable carbon isotope analysis by optical spectroscopy ::progress report ER -