Irving, Joan (June 1997). "Construction Paper: A Brief History of Impermanence". The Book and Paper Group Annual. AIC 25th Annual Meeting. Vol. 16. Archived from the original on 26 January 2012. Retrieved 18 November 2011. Construction Paper: A Brief History of Impermanence
Irving, Joan (June 1997). "Construction Paper: A Brief History of Impermanence". The Book and Paper Group Annual. AIC 25th Annual Meeting. Vol. 16. Archived from the original on 26 January 2012. Retrieved 18 November 2011. Construction Paper: A Brief History of Impermanence