49ers-Rams playoff history: 1989 NFC Championship preceded by 3 games
Los Angeles Rams - Wikipedia
San Francisco 49ers coverage - San Francisco Chronicle
Preview: NFC East rivalry takes the big stage
49ers-Giants: Remember when Ronnie Lott went 'ballistic' on Phil Simms for something he didn't say?
Giants vs. 49ers: History of a playoff rivalry
Montana hurt in championship game, 1991
Key moments from the Dallas Cowboys-San Francisco 49ers rivalry - ESPN
The Underrated Rivalry That Seems Like a Big Rivalry to Us Fans, But to Most Fans, Not So Much - Niners Nation