NIST
NIST, 1017b, Glass Beads - Particle Size Distribution (100 μm to 400 μm diameter range), 70g
NIST
NIST, 1019b, Glass Beads - Particle Size Distribution (750 μm to 2450 μm diameter range), 200g
NIST
NIST, 1115, Commercial Bronze Standard for Optical Emission and X-ray Spectroscopic Analysis, disk