"Schaken." . . . . "Chess Collections of games." . . "Sovjet-Unie." . . "Chess." . . . "Collections" . . . "Partijen (schaken)" . "Tigran Petrosian : world champion : 30 games" . . . "Tigran Petrosian, World Champion : 30 games" . "Tigran Petrosian, world champion : 30 games selected and annotated by Count A. O'Kelly de Galway,... ; translated by John Littlewood" . . . . . "Tigran Petrosian, world champion : 30 games" . . . . . . . . . . . . .