Mind You, This Time It's Not All Over - Sports Illustrated Vault
Ex-49ers wide receiver R.C. Owens dies at 77
Hall of Fame QB Y.A. Tittle dead at 90
The evolution of the shotgun formation in the NFL - The Athletic
Legendary 49ers coach dies of leukemia at 75 – East Bay Times
49ers Wide Receiver R.C. Owens Passes Away - Niners Nation
History of the San Francisco 49ers - Wikipedia