TY - GEN AU - D Burns AU - P Lamperti AU - C O'Brien C2 - Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD DA - 1999-02-01 00:02:00 LA - en M1 - 104 No. 2 PB - Journal of Research (NIST JRES), National Institute of Standards and Technology, Gaithersburg, MD PY - 1999 TI - Comparison of the NIST and BIPM Air-Kerma Standards for Measurements in the Low-Energy X-Ray Range ER -