Figure credits

Figures on some cards come from Wikimedia Commons contributors and are used under the licence shown on each card and listed under Figure credits.

Changes made to every figure: Scaled and placed on a study card beside our own text.

737 figures under 11 licences. Each licence name links to its deed, and each "Wikimedia Commons" link opens the figure's file page.

CC BY-SA 3.0

CC BY-SA 4.0

Public domain

CC BY 3.0

CC BY 4.0

CC0

CC BY 2.5

CC BY 2.0

CC BY-SA 2.5

CC BY-SA 2.1 jp

CC BY-SA 2.0 de