This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.
de condivider – de copiar, distribuer e transmitter le obra
de remixar – de adaptar le obra
Sub le sequente conditiones:
attribution – Tu debe dar information appropriate sur le autor, fornir un ligamine al licentia, e indicar si modificationes ha essite apportate. Tu pote facer lo de qualcunque maniera rationabile, ma non in alcun modo que suggere que le licentiator approba te o tu uso del obra.
condivider equalmente – Si tu altera, transforma o disveloppa le material, tu debe distribuer tu contributiones sub un licentia identic o compatibile con le original.