World Chess Championship 1966 - Wikipedia

The Petrosian-Spassky World Championship Match (Moscow, 1969), with annotations by Tal, Korchnoi, Boleslavsky & Bondarevsky.

Tigran Petrosian's Immortal Chess Game vs Spassky - Hijacking diagonals! Queen Sac! - Brilliancy!

USSR vs Rest of the World: A look back - Stabroek News

Could Petrosian have held against Fischer?

Tigran Petrosian (June 17, 1929 – August 13, 1984) - Chess Giants - CHESS POWER

Boris Spassky vs Tigran V Petrosian World Championship Match, 1966

Boris Spassky vs Tigran Petrosian • World Championship, 1966

Tigran Vartanovich Petrosyan, World Champion, Grandmaster, Armenian

Pal Benko, Who Stepped Aside for Bobby Fischer, Dies at 91 - The New York Times

Tactics Helping Strategy - Learn from Spassky and Petrosian (4h and 30 min Running Time)