JohnsonShull, Jim2022-07-162022-07-1619691969https://doi.org/10.31096/PNAA-JS-020https://hdl.handle.net/10177/19167Seem to be either glass or fiberglass.Educational use is permitted without permission. Permission is required for additional uses. See http://library.willamette.edu/external/commons/conditions_of_use/ for more information.Image