- Hardin, Becky, The Indiana State Flag: Its Designer (Biography of Paul Hadley with Anthology of his Paintings), p. 22 (1976)
- Perry, Rachel Berenson. “Paul Hadley and the Indiana Flag.”Traces of Indiana and Midwestern History 15:1 (Indiana Historical Society, Winter 2003): 20-29; “Paul Hadley, Indiana State Flag Designer.” Indiana Magazine (Indiana Dept. of Commerce, Nov. 1977): 24-25; MPL biographical handout.
"Paul Hadley looks on as Ralph E. Priest, a student at the John Herron Art Institute in Indianapolis, applies gold leaf to an Indiana state flag, circa 1923. When faculty and students at Herron learned that no state flag was on display in the Hoosier capital, they created the one seen here and presented it to the state. The Indiana Historical Bureau now safeguards the flag." [Photo and caption excerpted from Perry, Rachel Berenson. "Paul Hadley: Artist and Designer of the Indiana Flag," Traces of Indiana and Midwestern History. 15(1), 20-29 (2003)].
2016 UPDATE: Watch these biographical videos to learn more about Paul Hadley.