Petrosian v Spassky: The World Championships 1966 and 1969 (Paperback)
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Chess Daily News by Susan Polgar - Happy Birthday to Boris Spassky!
Weltgeschichte des Schachs, Lieferung 26: Tigran Petrosjan – The Chess Collector
Kingpin Chess Magazine » No Regrets: Boris Spassky at 60
Bobby Fischer - Geniuses
The 1969 World Chess Championship Match – The Chess Collector
Tigran Petrosian Facts for Kids
Tigran petrosian hi-res stock photography and images - Alamy
Should Russians have been allowed to compete in the World Chess Championship? - Quora
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por adulto (o preço varia de acordo com o tamanho do grupo)