USSR - World 1970 Belgrade, Yugoslavia
FIDE http://fideonline.com/news.asp?id=45 : ChessBase picture http://chessbase.com/newsdetail.asp?newsid=360
10 matches of 4 games
Spassky Larsen (Denmark) 1.5-2.5 : Petrosian Fischer (USA) 1.0-3.0
Korchnoi Portisch (Hungary) 1.5-2.5 : Polugayevsky Hort (Czechoslovakia) 1.5-2.5
Geller Gligoric (Yugoslavia) 2.5-1.5 : Smyslov Reshevsky (USA) 2.5-1.5
Taimanov Uhlmann (E. Germany) 2.5-1.5 : Botvinnik Matulovic (Yugoslavia) 2.5-1.5
Tal Najdorf (Argentina) 2.0-2.0 : Keres Ivkov (Yugoslavia) 3.0-1.0
Total USSR - World 20.5-19.5
Map : http://www.beograd.org.yu/english/ : Type "liblist USSR-World1970" for the games