Bosworth, BobShull, Jim2022-07-162022-07-1619671967https://doi.org/10.31096/PNAA-JS-068https://hdl.handle.net/10177/19212Work created c. 1965Variation on WCEducational 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/Jim Shull Slide - JS-068: ExtensionImage