You can find his games with white here:
http://www.chessgames.com/perl/chess.pl?yearcomp=exactly&year=&playercomp=white&pid=16149&player=&pid2=&player2=&movescomp=exactly&moves=&opening=&eco=&result=
And his games with black here:
http://www.chessgames.com/perl/chess.pl?yearcomp=exactly&year=&playercomp=black&pid=16149&player=&pid2=&player2=&movescomp=exactly&moves=&opening=&eco=&result=
The only problem is that you will have to download the games one by one or just veiw them online. You are not allowed to download all games in one file unless you are a paying member.
Anyway, hope that helps.
Does anyone know of a site or source of a databases of Tigran Petrosian games that consist of when he played the white pieces and when he played the black pieces? It would be much easier to study them divided that way.
Thanks