“…A common sampling technique called stratification (Chrzastowski, et al, 1989;Mead and Baird, 2003;Teper and Atkins, 2003;Nickerson, 1992;Walker, Greenfield, Fox, and Simonoff, 1985) occurs in different variations (collections, processes, floors, subject areas, and buildings, respectively) in major articles and throughout the preservation survey literature. Stratification allows for more accurate samples to be selected by creating sub-groups (strata) that are more homogenous then the entire population.…”