TY - RPRT TI - Circular of the Bureau of Standards no. 539 volume 8: standard x-ray diffraction powder patterns AU - Swanson, Howard E AU - Cook, Marlene I AU - Strinchfield, Roger AU - Parks, Paul C PY - 1959 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS CIRC 539v8 DO - 10.6028/NBS.CIRC.539v8 ER -