Robert Indiana, exh. cat., University Art Museum, Austin, 1977,
C. Weinhardt, Jr., Robert Indiana, New York, 1990, pp. 146 and 150 (illustrated in color).
Robert Indiana, Rétrospective 1958-1998, exh. cat., Musée d'art moderne et d'art contemporain, Nice, 1998, p. 239 (illustrated in color).
S. E. Ryan, Robert Indiana: Figures of Speech, New Haven, 2000, p. 268.
Humlebaek, Louisiana Museum, American Art 1950-1970, September-October 1971, pp. 24 and 40, no. 15 (illustrated).
Philadelphia, University of Pennsylvania, Institute of Contemporary Art; Houston, Rice University, Institute for the Arts and Akron Art Institute, The Highway, January-July 1970, p. 38 (titled Terre Haute; illustrated in color as frontispiece).