Trossarelli, L. (2010). "the history of nylon". Club Alpino Italiano, Centro Studi Materiali e Tecniche. Archived from the original on 2012-04-25. Retrieved 2012-02-28.
Trossarelli, L. (2010). "the history of nylon". Club Alpino Italiano, Centro Studi Materiali e Tecniche. Archived from the original on 2012-04-25. Retrieved 2012-02-28.