On a website that documents Audiocassettes, I also found the covers of my old TAM-Bulletins. In those days (the 80-ies) I worked with audiocassettes a lot, and in the TAM-Bulletin I also mentioned those details. Seems it comes from the Archive of Klaus Groh. Below the covers. Click on an image to enlarge the image. The documents were found on: https://www.tape-mag.com/index.php?navid=1&ln=1
