Cover of Po-wu-hsin-pien (textbook on natural sciences)
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Cover of Po-wu-hsin-pien (textbook on natural sciences). Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Cover of Po-wu-hsin-pien (textbook on natural sciences). Wellcome Collection. Source: Wellcome Collection.