West, BruceShull, Jim2022-07-162022-07-16https://doi.org/10.31096/PNAA-BW-025https://hdl.handle.net/10177/19007Same work in slides 11, 12. In show at Eugene.Welded metalEducational use is permitted without permission. Permission is required for additional uses. See http://library.willamette.edu/external/commons/conditions_of_use/ for more information.http://rightsstatements.org/vocab/InC-EDU/1.0/Image