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edicions
Canvis
→Regerències
* [[Llapis]]
* [[Llapis]]
== Regerències ==
== Referències ==
* Joseph Needham; Tsien Tsuen-Hsuin (11 de julio de 1985). Science and Civilisation in China: Volume 5, Chemistry and Chemical Technology, Part 1, Paper and Printing. Cambridge University Press. p. 234
* Joseph Needham; Tsien Tsuen-Hsuin (11 de julio de 1985). Science and Civilisation in China: Volume 5, Chemistry and Chemical Technology, Part 1, Paper and Printing. Cambridge University Press. p. 234
* Woods, Michael; Woods, Mary (2000). Ancient Communication: Form Grunts to Graffiti.pp 51–52. Minneapolis: Runestone Press; an imprint of Lerner Publishing Group
* Woods, Michael; Woods, Mary (2000). Ancient Communication: Form Grunts to Graffiti.pp 51–52. Minneapolis: Runestone Press; an imprint of Lerner Publishing Group