TY - RPRT TI - Standard beta-particle and monenergetic electron sources for the calibration of beta-radiation protection instrumentation : jointly sponsored by the U. S. Nuclear Regulatory Commission and the U. S. Department of Commerce AU - Ehrlich, M AU - Pruitt, J S AU - Soares, C G AU - Dick, C E AU - Heaton, H T AU - Schwartz, R B PY - 1985 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 85-3169 DO - 10.6028/NBS.IR.85-3169 ER -