Gilbert, Douglas R., “Spectators at WCFL Concert in Chicago,” Digital Collections, accessed April 4, 2025, https://digitalcollections.library.gvsu.edu/document/43506.
Black and white photograph of the audience at the WCFL Big 10 Summer Music Festival in Chicago, Illinois on July 18, 1970, by Douglas R. Gilbert. In the foreground a large peace flag waves in the wind over people as they lounge in the grass at Soldier Field. Scanned from the negative.