TY - RPRT TI - Scaling of Testing Speed for Different Source-to-Detector Distances AU - Norman, Bruce R. AU - Sallaska, Anne L. AU - Pibida, Leticia S. PY - 2015 PB - National Institute of Standards and Technology SN - NIST TN 1864 DO - 10.6028/NIST.TN.1864 ER -