TY - JOUR AU - Black, David AU - Mendenhall, Marcus AU - Henins, Albert AU - Filliben, James AU - Cline, James C2 - Powder Diffraction DA - 2020-01-15 LA - en PB - Powder Diffraction PY - 2020 TI - THE CERTIFICATION OF STANDARD REFERENCE MATERIAL 660C FOR POWDER DIFFRACTION ER -