TY - RPRT TI - XRAYL : a powder diffraction profile refinement program AU - Hubbard, C R AU - Stewart, J M AU - Zhang, Y AU - Morosin, B AU - Venturini, E L PY - 1988 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NIST IR 88-3850 DO - 10.6028/NIST.IR.88-3850 ER -