TY - GEN AU - Lamperti, Paul J AU - Loftus, Thomas P AU - Loevinger, Robert C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1988-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.250-16 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1988 TI - Calibration of x-ray and gamma-ray measuring instruments: ER -