lower left in graphite: 5/25 The Tunnel; lower right in graphite: June C. Wayne 6 '49; lower left on stone: JCW [artist's monogram]; lower left edge in graphite by unknown hand: X,4,12; lower right verso in graphite by unknown hand: E
- Gilmour, Pat. "A Love Affair with Lithography: The Prints of June Wayne." Print Quarterly 9, no. 2 (1992): no. 5.
- Conway, Robert P. June Wayne, the Art of Everything: A Catalogue Raisonné, 1936-2006. New Brunswick, New Jersey: Rutgers University Press, 2007, p. 61, no. 47.