Welsh media bbc wales htv and the echo

What has happened to all the footage from the past regarding city, I've not seen hardly any coverage of city apart from the 77 cup run, 83 promotion the real madrid goal and bits and pieces before the 90's Pretty much every game since the 50's was photographed by the echo where are the photos? Also itv wales and bbc Wales must of covered all the games as they always showed the goals on a Monday night ? Any ideas ?