Different types of paper

Understanding the Different Paper Types

https://www.rubiks.ca/resource-center/useful-printing-tips/26-american-paper-sizes–what-are-the-american-paper-sizes-how-to-convert-paper-sizes.html?lang=EN

http://www.biltpaper.com/atoz3.asp

http://www.rbms.info/committees/bibliographic_standards/controlled_vocabularies/paper/th343.htm

http://kimscrane.com/index.php?main_page=index&cPath=21_26_37