Who were the members of the White Rose?

The following is a sidebar contained within the chapter "Sophie Scholl and the White Rose" from "Women Heroes of World War II."

"Who Were the Members of the White Rose?"

"The White Rose was not a membership club in the usual sense. It began casually with a group of university friends who often met to discuss art, music, literature, and philosophy. Soon they realized that they had the same political opinions. They were all decidedly anti-Nazi and, inspired by the successful duplication of Bishop von Galen's sermon, decided to write their own "sermons" of protest. The core group, the ones most responsible for the creation and distribution of the leaflets, were Hans Scholl, Sophie Scholl, Christoph Probst, Alexander Schmorell, Willi Graf, and Traute Lafrenz. But numerous others were involved, such as fellow student and friend Jurgen Wittenstein, who edited several of the leaflets, and Kurt Huber, a university professor, who wrote the sixth leaflet."

Taken from "Sophie Scholl and the White Rose" from Women Heroes of World War II: 26 Stories of Espionage, Sabotage, Resistance, and Rescue.