TY - GEN AU - Howard E Swanson C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1953-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CIRC.539v2 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1953 TI - Circular of the Bureau of Standards no. 539 volume 2::standard x-ray diffraction powder patterns ER -