When researching your topic, make sure to use the offical name of the Olymic game you will find more focused information:
Games of the XI Olympiad Berlin, 1936
Games of the XV Olympiad Helsinki, 1952
THE GAMES OF THE XVII OLYMPIAD ROME, 1960
the Games of the XIX Olympiad Mexico City, 1968
The Games of the XXth Olympiad Munich, 1972
Games of the XXII Olympiad Moscow, 1980
Games of the XXIInd Olympiad Los Angeles, 1984
XIV Olympic Winter Games Sarajevo, 1984