(页面存档备份,存于互联网档案馆) – The University of Southern Mississippi SPI resin identification code – SocietyofthePlasticsIndustry Polystyrene: Local Ordinances (页面存档备份,存于互联网档案馆)
412 (6844), pp. 321–324. PFOA Facts (Society ofthePlasticsIndustry, Inc.(SPI), 2005). PFOA Facts The Chemical Heritage Foundation (2000). Roy J. Plunkett