Highly recommended reading: The Long Loneliness, the Autobiography of Dorothy Day that was first published in 1952. It has not aged a bit.
See also:
1977 Interview with Dorothy Day.
https://www.youtube.com/watch?v=oDkv2ULYSXA
Extended Interview with Robert Ellsberg about Dorothy Day and the cause for sainthood (posted 2013). http://www.youtube.com/watch?v=YviTrmrI0hM