Joseph Pintauro. To believe in man. New York: Harper & Row, 1970 

“During the 1960s and early '70s, Corita's friendship and esteem for Philip and Daniel Berrigan, Joseph Pintauro, and Gerald Huckaby led to her collaboration on several of their publications. Through her art, she echoed -and supported- their socially and politically conscious statements.”

Bernard Galm. Los Angeles art community group portrait: Corita Kent. Los Angeles: Oral History Program, University of California, 1977 (p. ix)

https://archive.org/details/coritakentoralhi00cori