TY - GEN AU - Pruitt, John S AU - Soares, Christopher G AU - Ehrlich, Margarete C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1988-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.250-21 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1988 TI - Calibration of beta-particle radiation instrumentation and sources: ER -