![](https://catholicscientists.org/content/uploads/2018/08/Roothan-Barr-scaled.jpg)
Distinguished Catholic Scientist Turns 100
August 29, 2018, is the one-hundredth birthday of Clemens C.J. Roothaan, a member of the Society of Catholic Scientists, who is ...
August 29, 2018, is the one-hundredth birthday of Clemens C.J. Roothaan, a member of the Society of Catholic Scientists, who is ...