TY - GEN AU - Swanson, Howard E AU - Isaacs, Thelma AU - Evans, Eloise H C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1960-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.CIRC.539v9 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1960 TI - Circular of the Bureau of Standards no. 539 volume 9::standard x-ray diffraction powder patterns ER -