"File:Flag of Tulsa (1941–1973).jpg - Wikimedia Commons" https://commons.m.wikimedia.org/wiki/File:Flag_of_Tulsa_(1941%E2%80%931973).jpg
"File:Flag of Tulsa (1941–1973).jpg - Wikimedia Commons" https://commons.m.wikimedia.org/wiki/File:Flag_of_Tulsa_(1941%E2%80%931973).jpg