Playbook excerpt from the 1988 Cincinnati Bengals playbook for "The Huddle-Formation-Cadence-Procedure". (photocopy), Box: 1, Folder: 6. Cradle of Coaches Archive - Paul Brown Collection, Mss. Coll. Cradle: P. Brown. Walter Havighurst Special Collections Finding Aids. https://archivesspace.lib.miamioh.edu/repositories/7/archival_objects/220 Accessed April 26, 2025.