TY - GEN AU - Domen, Steve R C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1978-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.IR.77-1203 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1978 TI - Central-axis ⁶⁰CO ionization measurements in graphite as a function of phantom diameter, depth, and field size: ER -