Chessmetrics Ratings: June 30, 1956

World Chess Championship 1972 - Wikipedia

What was Bobby Fischer's rating per age from his first chess game to the time he retired? - Quora

Boris Spassky, Biography & Facts

Boris Spassky, PDF, Chess Openings

Monthly Lists: 1968 - 1971

64: A Chess Podcast on X: Spassky is very underrated. He will be remembered forever as the loser of the 1972 World Chess Championship, but in many respects he was Magnus before

Boris Spassky's Road to the Summit: W. H. Cozens: : Books

Chess: World Rating System Puts Fischer Ahead of Spassky - The New York Times

Boris Spassky's 400 Selected Games (Games Collections)

How many games did Bobby Fischer have to win to beat Boris Spassky? - Quora