A Trove of 70s Memorabilia
Here is an extensive collection of material relating to the cultural situation in Houston during the 1970s consisting mostly ads from counter culture publications.
The material was originally posted on HAIF's Historic Houston forum but was moved to Picasa. The original post spawned a discussion which can be found here with additional material of interest.
Although this is not really about radio it does illustrate some of the culture of the day which influenced the programming of numerous stations. This will appear as a link on the sidebar under History Links.