TY - GEN AU - McGinnies, Rosemary T C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1959-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CIRC.583sup LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1959 TI - Supplement to National Bureau of Standards Circular no. 583::x-ray attenuation coefficients from 10 kev to 100Mev ER -