TY - JOUR AU - Patrick Egan AU - Jack Stone C2 - Applied Optics DA - 2011-06-20 DO - https://doi.org/10.1364/AO.50.003076 LA - en M1 - 50 PB - Applied Optics PY - 2011 TI - Absolute refractometry of dry gas to ±3 parts in 109 ER -