Joseph Bertrand
Joseph Louis François Bertrand (1822 nî 3 goe̍h 11 ji̍t – 1900 nî 5 goe̍h 5 ji̍t) sī chi̍t ūi Hoat-kok ê sò͘-ha̍k-ka.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9a/Bertrand.jpg/225px-Bertrand.jpg)
Joseph Louis François Bertrand (1822 nî 3 goe̍h 11 ji̍t – 1900 nî 5 goe̍h 5 ji̍t) sī chi̍t ūi Hoat-kok ê sò͘-ha̍k-ka.