Wikibooks:Risorse di immagini di pubblico dominio: differenze tra le versioni

* http://www.wfu.edu/~tedforrl/imagcoll.html

* http://protist.i.hosei.ac.jp/Science_Internet/TI_2001E/index.html

* http://www.archivalart.com/

* http://www.princetonol.com/groups/iad/links/clipart.html (a lengthy list of categorised links to other public domain image sources, many of those links don't work though)