TY - GEN AU - John S Pruitt C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1990-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.SP.250-40 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1990 TI - Absorbed-dose calibration of ionization chambers in a ⁶⁰Co gamma-ray beam: ER -