NBS PUBLICATIONS AlllDE 3SS7^ NAT'UNST OF STANDARDS i TECH R I G. /NR^ A1 11 02350574 /NBS monograph QC100 .U55S \^5,SECT.21;1986 C.2 NB8-PUB Q o Q NBS MONOGRAPH 25- SECTION 21 QC 100 .U556 No. 25 Sect. 21 1985 c.2 U.S. DEPARTMENT OF COMMERCE/National Bureau of Standards Standard X-ray Powder Patterns